Perl Wiki Tree

Notes:
⊕ Nodes just under the root ('MetaCurator') are called Topics. Paragraphs is the TiddlyWiki equivalent.
⊕ Tokens like [[XS]] indicate a topic (a TiddlyWiki paragraph name), not a Perl module.
⊕ Almost all leaf node are links. Use a middle-button click to open the link in another tab.
⊕ The code does not yet cleanly handle special cases such as pre-formatted paras.
⊕ My other module, CPAN::MetaPackages, builds & ships an SQLite db containing 02packages.details.txt.
⊕ Most recent version of 02packages.details.txt used: Last-Updated: Sun, 14 Jun 2026 23:17:02 GMT .
⊕ Acronyms: 271. CPAN modules: 265554. Wiki modules: 6839. Topics: 214. Unclassified: 5383.

MetaCurator
- ABeCeDarian
  - ⊕ See also
    - It means in abcd order, i.e. alphabetical, so I can put it first in the list of topics :-)
    - [Topic]
    - [Topic]
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    - https://blogs.perl.org/users/robert_acock/2026/01/ready-set-compile-you-slow-camel.html
    - Serialization of data to ram/disk
  - App::CSVUtils - CLI utilities related to CSV
  - ⊕ Notes for App::CSVUtils
    - The module contains 64 scripts
  - App::SQLiteUtils - Utilities related to SQLite
  - CPAN::Maker::Bootstrapper - Scaffold a new CPAN distribution in one command
  - ⊕ Notes for CPAN::Maker::Bootstrapper
    - Contains CPAN::Maker::ConfigReader etc
  - Cron::Toolkit - Quartz-compatible cron parser with unique extensions and over 400 tests
  - Crypt::PBKDF2 - The PBKDF2 password hashing algorithm.
  - ⊕ Notes for Crypt::PBKDF2
    - See also PBKDF2::Tiny
  - CXC::Exporter::Util - Tagged Based Exporting
  - Data::KSUID - KSUID are a globally unique identifier similar to UUIDs but designed to be naturally sorted by generation timestamp and to have representations that are easily postable across systems
  - Data::OptList::Object - Data::OptList, but object-oriented
  - Data::Path::XS - Fast path-based access to nested data structures
  - DBD::SQLite - Self-contained RDBMS in a DBI Driver
  - DBD::SQLite::Constants - Common SQLite constants
  - DBIx::AutoUpgrade::NativeStrings - Automatically upgrade Perl native strings to utf8 before sending them to the database
  - ⊕ Notes for DBIx::AutoUpgrade::NativeStrings
    - Primarily for DBD::Oracle, DPD::Pg and DBD::SQLite
  - Destructure::Declare - Lexically scoped structural destructuring let
  - Dev::Util - Base modules for Perl Development
  - Devel::Bug - Transparent inline debugging probe (pure Perl)
  - e - Beast mode unleashed
  - Email::Stuffer - A more casual approach to creating and sending Email:: emails
  - File::Sticker - Read, Write file meta-data
  - ⊕ Notes for File::Sticker
    - Includes sticker which sticks tags onto files, populates a database with file meta-data
    - See also Data::TagDB in DatabaseAndSQL1
  - ixchel - Automate various sys admin stuff
  - ⊕ Notes for ixchel
    - Contains about 50 modules
  - List::Util::Find - List utilities related to finding items
  - Locale::Codes - A distribution of many modules to handle locale codes
  - Melian - Perl client to the Melian cache
  - ⊕ Notes for Melian
    - More details in CachingStuff
  - Net::Gotify - Gotify client for Perl
  - ⊕ Notes for Net::Gotify
    - I feel this may become extremely popular
  - Net::IPData - Perl client for the ipdata.co IP geolocation and threat intelligence API
  - Net::Server - Extensible, general Perl server engine
  - ⊕ Notes for Net::Server
    - Has a massive amount of flexibility
  - Number::Finance::Human - Human-readable numbers for accounting and finance
  - Object::InsideOut - Comprehensive inside-out object support module
  - Object::InsideOut::Metadata - Introspection for Object::InsideOut classes
  - Path::Tiny - Provides methods like slurp_utf8 and spew_utf8 to read and write files using the correct encoding
  - PAX - Perl Adaptive eXecution compiler and standalone binary packager
  - PDF::Reuse - Reuse and mass produce PDF documents
  - ⊕ Notes for PDF::Reuse
    - This module has an important See Also
  - pdftotext - Poppler is a PDF rendering library based on the xpdf-3.0 code base
  - ⊕ Notes for pdftotext
    - Appears to be installed as part of Debian
  - Perl::Critic::Community - Community-inspired Perl::Critic policies
  - Perl::Critic::Policy::Community::DiscouragedModules - Various modules discouraged from use
  - Perl::Critic::Policy::Community::PreferredAlternatives - Various modules with preferred alternatives
  - Quote::Code - Quoted strings with arbitrary code interpolation
  - Random::Simple - Simple, usable, real world random numbers
  - Rose::DB - A DBI wrapper and abstraction layer
  - Rose::DB::Object - Extensible, high performance object-relational mapper (ORM)
  - ⊕ Notes for Rose::DB::Object
    - Contains Rose::DB::Object::Tutorial - A guided tour of the basics of Rose::DB::Object
    - Contains Rose::DB::Object::Loader, Rose::DB::Object::Manager, etc
    - See also https://dev.to/dragostrif/rosedb-orm-and-perl-3dig
  - Server::Starter - A superdaemon for hot-deploying server programs
  - SQL::Wizard - Composable SQL query builder with expression trees
  - String::Escape - Backslash escapes, quoted phrase, word elision, etc
  - String::ShellQuote - Quote strings for passing through the shell
  - ⊕ Notes for String::ShellQuote
    - Does not decode ANSI escape codes
  - Switch::Declare - Compile-time, lexically-scoped switch/case
  - Test::Most::Explain - Enhanced diagnostics for Test::More with structured diffs and helpful hints
  - Text::CSV::Slurp - Convert CSV into an array of hashes, or an array of hashes into CSV
  - Text::Stencil - Fast XS list/table renderer with escaping, formatting, and transform chaining
  - Text::Table::Manifold - Render tables in manifold formats
  - ⊕ Notes for Text::Table::Manifold
    - Its See Also lists about similar 40 modules
  - Text::Table::Tiny - Generate simple text tables from 2D arrays
  - Thread::Subs - Execute selected subs concurrently in worker threads
  - ⊕ Notes for Thread::Subs
    - The POD is very sophisticated
  - Time::Moment - Represents a date and time of day with an offset from UTC
  - TOML - Tom's Obvious, Minimal Language is a file format for configuration files
  - ⊕ Notes for TOML
    - Supports the following data types: string, integer, float, boolean, datetime, array, and table
  - Type::Registry - A glorified hashref for looking up type constraints
  - Type::Tiny - Tiny, yet Moo(se)-compatible, type constraint
  - ⊕ Notes for Type::Tiny
    - Contains Types::Standard and many other modules
  - Types::Common - The one stop shop
  - utf8::all - Turn on Unicode - all of it
  - Unicode::CheckUTF8 - Checks if scalar is valid UTF-8
  - Unicode::UTF8 - Encoding and decoding of UTF-8 encoding form
- Acronyms
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For a great overview of mDNS, ZeroConf, etc
    - https://en.wikipedia.org/wiki/International_Electrotechnical_Commission
    - https://en.wikipedia.org/wiki/International_standard
  - 2FA - Two-Factor Authentification
  - ABNF - Augmented BNF
  - ⊕ Notes for ABNF
    - Note: rfc5234 obsoletes rfc4234
  - ACMA - Australian Communications and Media Authority
  - ACME - Automatic Certificate Management Environment
  - AEAD - Authenticated encryption with associated data
  - AEO - Answer Engine Optimization
  - AES-GCM-SIV - A mode of operation for the Advanced Encryption Standard
  - AISO - AI Summarization Optimization
  - AI SEO - AI Search Engine Optimization
  - AKE - Authenticated Key Exchange
  - ANSI - The American National Standards Institute
  - APNG - Is an unofficial extension of the PNG image format
  - ARRL - American Radio Relay League
  - ART - Allotment Routing Tables
  - Art-Net - Art-Net is a simple implementation of DMX512-A protocol over UDP
  - ASN.1 - Abstract Syntax Notation One
  - ATP - Authenticated Transfer Protocol (AT Protocol or atproto) is a generic federated protocol for building open social media applications
  - AVX-512 - Advanced Vector Extensions 512-bit, a feature of Intel chips
  - BART - Balanced Routing Tables
  - Base64 - A binary-to-text encoding that uses 64 printable characters to represent each 6-bit segment of a sequence of byte values
  - ⊕ Notes for Base64
    - https://tc39.es/ecma426/#sec-base64-vlq
  - BCCN - Broadcast Channel Notifications protocol
  - BCP-47 - IETF BCP 47 language tag is a standardized code that is used to identify human languages on the Internet
  - BGP - Border Gateway Protocol
  - BibTeX - Is both a bibliographic flat-file database file format and a software program
  - BIMI - Brand Indicators for Message Identification
  - ⊕ Notes for BIMI
    - https://metacpan.org/pod/Mail::BIMI
  - BLAS - Basic Linear Algebra Subprograms
  - BLE - Bluetooth Low Energy
  - BOM - Byte Order Mark
  - BPMN - Business Process Model and Notation
  - BUFR - Binary Universal Form for the Representation of meteorological data
  - CALDAV - Calendaring Extensions to WebDAV
  - CAMT - CAsh ManagemenT
  - ⊕ Notes for CAMT
    - https://www.iso20022.org/
  - CAS - Content-addressable Storage
  - CBC - Cipher block chaining
  - CBOR - Concise Binary Object Representation
  - CBR - A .cbr file is essentially a renamed RAR compressed archive file (like a .rar file)
  - CBZ - See CBR. It uses ZIP compression rather than RAR
  - CD/CR - Continuous Discovery/Continuous Repair
  - CDM - Common Data Model
  - CDP - Chrome DevTools Protocol
  - CI/CD - Continuous Integration/Continuous Delivery
  - CIDR - Classless Inter-Domain Routing
  - CitizenLab - Counterintelligence for civil society
  - CLDR - Common Locale Data Repository
  - CLI - Command Line Interface
  - CNA - CVE Numbering Authority
  - ⊕ Notes for CNA
    - See below CVE
  - CNAG - Centro Nacional de AnÃ¡lisis GenÃ³mico
  - CORS - Cross-Origin Resource Sharing
  - ⊕ Notes for CORS
    - http://www.w3.org/TR/cors
    - https://web.archive.org/web/20120724073230/http://www.html5rocks.com/en/tutorials/cors/
  - CPaaS - Communication Platform as a Service
  - CRDT - Conflict-free Replicated Data Type
  - CSV - Comma-Separated Variables
  - CUPS - Common Unix Printing System Interface
  - CVE - Common Vulnerabilities and Exposures
  - ⊕ Notes for CVE
    - See above CNA
  - DAG - Directed Acyclic Graph
  - DBIC - Database Independence Connectivity
  - DDP - Datagram Delivery Protocol
  - ⊕ Notes for DDP
    - See UDP below
  - DFA - Deterministic finite automaton
  - DHCP - Dynamic Host Configuration Protocol
  - DHT - Distributed Hash Table
  - DHTML - Allows scripting languages to modify variables and elements in a web page
  - DKIM - DomainKeys Identified Mail
  - DMARC - Domain-based Message Authentication, Reporting, and Conformance
  - ⊕ Notes for DMARC
    - An email authentication protocol that helps protect domain owners and recipients from email spoofing, phishing, and other email-based attacks
    - https://datatracker.ietf.org/doc/html/draft-crocker-dmarc-bcp-03
  - DMS - Data Meta Syntax
  - DMT - Data Model Tree
  - DNS - Domain Name System
  - DNS-SD - DNS Service Discovery
  - ⊕ Notes for DNS-SD
    - Similar to ZeroConf
  - DPI - Deep Packet Inspection
  - DSL - Domain Specific Language
  - DWG - Used for computer-aided design (CAD) programs. It stands for 'Drawing'
  - ⊕ Notes for DWG
    - It is the native file format for Autodesk's AutoCAD software
  - DXCC - DX Century Club
  - EAI - Enterprise Application Integration
  - ECDLP - Elliptic Curve Discrete Logarithm Problem
  - ECHR - European Convention on Human Rights or European Court of Human Rights
  - ⊕ Notes for ECHR
    - https://en.wikipedia.org/wiki/European_Court_of_Human_Rights
    - See HUDOC below
  - ECI - Earth-Centered Inertial
  - ECS.2 - Stands for Entity Component System, is a software architectural pattern
  - ⊕ Notes for ECS.2
    - https://en.wikipedia.org/wiki/Entity_component_system#:~:text=Entity%E2%80%93component%E2%80%93system%20(ECS,Entity%E2%80%93Component%E2%80%93System%20layout
  - EDA - Electronic Design Automation
  - ⊕ Notes for EDA
    - See PDK below
  - EdDSA - Edwards-Curve Digital Signature Algorithm
  - ⊕ Notes for EdDSA
    - https://tools.ietf.org/html/rfc8032
  - Ed25519 - Ed25519 is the EdDSA signature scheme using SHA-512 (SHA-2) and an elliptic curve related to Curve25519
  - ⊕ Notes for Ed25519
    - https://en.wikipedia.org/wiki/Curve25519
  - EnTT - Is a header-only, tiny and easy to use library for game programming and much more written in modern C++
  - EPP - Extensible Provisioning Protocol (EPP) Domain Name Mapping
  - Etcd - A key-value database commonly deployed with distributed systems (e.g. Kubernetes)
  - ETL - Extract, Transform, and Load
  - EXT4 - Fourth extended filesystem
  - ⊕ Notes for EXT4
    - See also STAX4
  - FFI - Foreign Function Interface
  - Flatpak - A utility for software deployment and package management for Linux
  - FTN - Fidonet Technology Network Address. Almost obsolete
  - GCM - Galois/Counter Mode
  - GDB - A graph database (GDB) that uses graph structures for semantic queries
  - ⊕ Notes for GDB
    - https://en.wikipedia.org/wiki/Property_graph
    - See GQL below
  - GDPR - General Data Protection Regulation
  - GEMM - General Matrix Multiplication
  - GEO - Generative Engine Optimization
  - GFM - GitHub-Flavored Markdown
  - Gitea - A package for hosting software development version control using Git etc
  - GMP - GNU Multiple Precision Arithmetic Library
  - GPID - General Purpose Interface Bus
  - ⊕ Notes for GPID
    - https://opencypher.org/
  - GQL - Graph Query Language
  - ⊕ Notes for GQL
    - https://opencypher.org/
    - See GDB above
  - HEIF - High Efficiency Image File Format
  - HIDS - Host-based intrusion detection systems
  - HMAC - Hash-based Message Authentication Code
  - HPC - High-Performance Computing
  - HSM - Hardware Security Module
  - HTSP - Seems to be a streaming version of HTTP
  - HTTP - Hypertext Transfer Protocol
  - HTTP/2 - Hypertext Transfer Protocol Version 2
  - HUDOC - HUman Rights DOCumentation
  - ⊕ Notes for HUDOC
    - See ECHR above
  - i3 - Is a tiling window manager
  - IAB - Interactive Advertising Bureau'
  - IBGE - Brazilian Institute of Geography and Statistics (Portuguese: Instituto Brasileiro de Geografia e EstatÃstica)
  - iCalandar - Internet Calendaring and Scheduling Core Object Specification
  - ICIJ - The International Consortium of Investigative Journalists
  - IDN - Internationalized domain name
  - IDS - Intrusion detection system
  - IEC - International Electrotechnical Commission
  - IETF - Internet Engineering Task Force
  - IMAP - Internet Message Access Protocol
  - I-SCAN - International Securities & Commodities Alerts Network
  - IoT - Internet of Things
  - IP - Internet Protocol
  - IPFS - InterPlanetary File System
  - IPLD - InterPlanetary Linked Data
  - IPS - Intrusion prevention system
  - IPv6 - Default Address Selection for Internet Protocol Version 6
  - IRI - Internationalized Resource Identifiers
  - ⊕ Notes for IRI
    - The IRI module provides an object representation for Internationalized Resource Identifiers (IRIs) as defined by RFC 3987 and supports their parsing, serializing, and base resolution
  - ISAAC - Indirection, shift, accumulate, add, and count
  - JMAP - JSON Meta Application Protocol
  - JNG - A file extension standing for JPEG Network Graphics
  - JSON - JavaScript Object Notation
  - JWKS - JSON Web Key Set (not on Wikipedia yet)
  - KARR - Kanban Assignment & Responsibility Registry
  - KDE - An international free software community
  - KDL - Kernel Debugging Land
  - KEM - ML-KEM is short for Module-Lattice-Based Key-Encapsulation Mechanism
  - LCCN - Library of Congress Control Number
  - LCSAJ - Linear code sequence and jump
  - LDAP - Lightweight Directory Access Protocol
  - ⊕ Notes for LDAP
    - RFC2307 - Using LDAP as a Network Information Service
    - https://datatracker.ietf.org/doc/html/rfc4514 - primary - DN (LDAP)
    - https://datatracker.ietf.org/doc/html/rfc4512 - secondary - DN (LDAP)
    - https://datatracker.ietf.org/doc/html/rfc4517 - DN (LDAP)
    - https://datatracker.ietf.org/doc/html/rfc2253 - UTF-8 String Representation of DNs
  - LDF - Linked Data Fragment
  - LEB128 - Little Endian Base 128
  - LES - Large-Eddy Simulation
  - LLMO - Large-Language Model Optimization
  - LMDB - Lightning Memory-Mapped Database
  - LSA - Link-state advertisement
  - LSDB - Link-state database
  - MathJax - A Javascript display engine for rendering TeX or MathML-coded mathematics in browsers without requiring font installation or browser plug-ins.
  - MathML - Mathematical Markup Language is a pair of markup languages
  - MCP - Model Context Protocol
  - mDNS - multicast DNS
  - ⊕ Notes for mDNS
    - Implementations: Apple Bonjour and open-source Avahi
  - METAR - A format for reporting weather information
  - MetaSyntatic variable - A specific word or set of words identified as a placeholder
  - MIDI - Musical Instrument Digital Interface
  - MiFIR - Stands for the Markets in Financial Instruments Regulation
  - MIME - Multipurpose Internet Mail Extensions (MIME) Part One
  - MISP - MISP Threat Sharing, formerly known as Malware Information Sharing
  - MODS - Metadata Object Description Schema
  - MPC - Multiple Precision Complex Library
  - MPFR - Multiple Precision Floating-Point Reliable Library
  - MPMC - Multi-Producer, Multi-Consumer
  - MQTT - An OASIS standard messaging protocol for the Internet of Things (IoT)
  - MX record - Mail exchanger record
  - NBI - Non-Blocking Interface (or sometimes Non-Blocking Invocations).
  - NIDS - Network intrusion detection systems
  - Noise - Noise Protocol Framework
  - NoStr - Notes and Other Stuff Transmitted by Relays
  - NS - Name server
  - NWS - National Weather Service (USA)
  - NX-OS - A network operating system various switches
  - ⊕ Notes for NX-OS
    - Aka NXOS
  - OAEP - Optimal Asymmetric Encryption Padding
  - OATH - Open Authentication (OATH)
  - ⊕ Notes for OATH
    - See also TOTP
  - OCD - Obsessive-Compulsive Disorder
  - ⊕ Notes for OCD
    - See ERP
  - ODF - OpenDocument Format
  - OIDC - OpenID Connect
  - OMOP - Observational Medical Outcomes Partnership
  - ONC - Open Network Computing
  - ⊕ Notes for ONC
    - See also RPC
  - OPC UA - Open Platform Communications Unified Architecture
  - ⊕ Notes for OPC UA
    - Aka IEC 62541
  - OpenAPI - A specification for a machine-readable interface definition language
  - OODA - Observe, Orient, Decide, Act
  - ⊕ Notes for OODA
    - It Is a framework to understand decision-making in adversarial situations
  - OPTiMaDe - Open Database API for Materials Design
  - OSLV - OS-Level Virtualization
  - OSPF - Open Shortest Path First (OSPF) TCP/IP internet routing protocol
  - OVSDB - Open vSwitch Database
  - PATRICIA - Practical Algorithm to Retrieve Information Coded in Alphanumeric
  - PBKDF - Password-based cryptography key derivation functions
  - ⊕ Notes for PBKDF
    - Obsoleted by PKCS
  - PBS - Perl Build System
  - PDK - Process Design Kit
  - ⊕ Notes for PDK
    - See EDA above
  - PDL - The Perl Data Language
  - PEX - Peer Exchange
  - PharmGKB - The Pharmacogenomics Knowledgebase
  - PKCS - Public-Key Cryptography Standards
  - ⊕ Notes for PKCS
    - Replaces rfc2898
  - PML - Prague Markup Language
  - POE - A framework for cooperative, event driven multitasking and networking
  - POLA - Principle of least astonishment
  - ⊕ Notes for POLA
    - Aka POLS - Principle of least surprise
  - POSIX - Portable Operating System Interface
  - PQC - Post-quantum cryptography
  - PSP - A html template suffix used by WebDyne
  - ⊕ Notes for PSP
    - See [[HTTPServers]]
  - QFT - Quantum Field Theory
  - Quadstore - A specialized type of database designed to store and query 'quads'
  - Quadtree - A tree data structure in which each internal node has exactly four children
  - Quartz - An open-source job scheduling library for Java applications
  - ⊕ Notes for Quartz
    - For usage in Perl, see RRD::Fetch in DatabaseAndSQL1
    - RRD itself is defined below
  - qv - which see. Used after a phrase that should be looked up elsewhere
  - RAG - Retrieval-augmented generation
  - RAII - Resource Acquisition Is Initialization
  - RAR - Roshal ARchive - A proprietary archive file format that supports data compression, error correction and file spanning
  - RBAC - Role-Based Access Control
  - RCON - Any method of controlling a computer from a remote location
  - RDAP - Registration Data Access Protocol
  - ⊕ Notes for RDAP
    - https://www.rfc-editor.org/rfc/rfc7483
  - RDF - Resource Description Framework
  - ⊕ Notes for RDF
    - https://en.wikipedia.org/wiki/N-Triples
    - https://en.wikipedia.org/wiki/N-Triples#N-Quads
  - RDM - Remote Device management
  - RPC - Remote Procedure Call
  - ⊕ Notes for RPC
    - See also ONC
  - RPKI - Resource Public Key Infrastructure
  - RPM - Was Red Hat Package Manager. Is a recursive acronym for RPM Package Manager
  - RRD - Round-Robin Database
  - ⊕ Notes for RRD
    - For usage in Perl, see RRD::Fetch in DatabaseAndSQL1
  - RSS - RDF Site Summary or Really Simple Syndication
  - RFC - Request For Comment
  - RTIR - Request Tracker for Incident Response
  - SAC - Simple API for CSS
  - Sagan - A real-time log analysis & correlation engine
  - SCCS - Source Code Control System
  - SCM - Software Configuration Management
  - SDL3 - Simple DirectMedia Layer
  - SIMD - Single Instruction, Multiple Data) registers, a feature of Intel chips
  - SIMD - Single instruction, multiple data
  - SIP - Session Initiation Protocol
  - SLURM - Simple Linux Utility for Resource Management
  - S.M.A.R.T. - Self-Monitoring, Analysis, and Reporting Technology
  - SNMP - Simple Network Management Protocol
  - SOAR - State, Operator, And Result or Security Orchestration, Automation, and Response
  - SPARQL - SPARQL Protocol and RDF Query Language
  - SPDX - System Package Data Exchange
  - SPF - Sender Policy Framework
  - SPQA - State, Policy, Questions, Action
  - SPQR - Sparse Post Quantum Ratchet
  - SSL - Secure Sockets Layer
  - ⊕ Notes for SSL
    - Obsoleted by TSL
  - STAX4 - (part of) Fourth extended filesystem
  - ⊕ Notes for STAX4
    - See also EXT4
  - STOMP - Streaming Text Orientated Messaging Protocol
  - Suricata - An open-source network analysis and threat detection software
  - SWF - ShockWave Flash
  - TCF - Transparency and Consent Framework
  - TCP - Transmission Control Protocol
  - TEE - Trusted Execution Environments aka Secure Enclaves
  - TeX - TeX is a popular means of typesetting complex mathematical formulae
  - TOML - Tom's Obvious, Minimal Language is a file format for configuration files
  - ⊕ Notes for TOML
    - Supports the following data types: string, integer, float, boolean, datetime, array, and table
  - TOON - Token-Oriented Object Notation for Perl
  - TOTP - Time-Based One-Time Password Algorithm
  - ⊕ Notes for TOTP
    - See also OATH
  - TPRM - Third-party risk management
  - Triplestore - A triplestore or RDF store is for the storage and retrieval of triples
  - TSL - Transport Layer Security
  - ⊕ Notes for TSL
    - Successor to SSL
  - Turtle - Terse RDF Triple Language
  - UDB - IBM's DB2 Universal Database
  - UDP - User Datagram Protocol
  - ⊕ Notes for UDP
    - https://en.wikipedia.org/wiki/User_Datagram_Protocol
    - See also DDP above
  - UAX - Unicode Standard Annex
  - UCS - Universal Coded Character Set
  - ⊕ Notes for UCS
    - Aka Unicode
  - UDC - Universal Decimal Classification
  - ULID - Universally Unique Lexicographically Sortable Identifier
  - UPCA - Stands for Universal Product Code, Version A
  - URI - Uniform Resource Identifiers (absolute and relative)
  - ⊕ Notes for URI
    - A compact sequence of characters for describing a range of Uniform Resource Identifiers through variable expansion
    - https://datatracker.ietf.org/doc/html/rfc6570
    - See also URL below
  - URL - Uniform Resource Locator
  - ⊕ Notes for URL
    - These are a subset or URI above
  - UTDF - Universal Tracking Data Format
  - UTF-8 - A transformation format of ISO 10646
  - UUID - A Universally Unique IDentifier (UUID) URN Namespace
  - VAPID - Voluntary Application Server Identity
  - VLQ - Variable-Length Quantity
  - Vonage - An American cloud communications provider operating as a subsidiary of Ericsson
  - WebDAV - Web Distributed Authoring and Versioning
  - WebPA - Bitmapped graphics file format from Google
  - WGS - World Geodetic System
  - WMO - World Meteorological Organization
  - XAO - A set of perl modules created primarily for building dynamic, database driven web sites
  - XDR - External Data Representation Standard
  - XMPP - Extensible Message Passing Protocol
  - XPDL - The XML Process Definition Language
  - XSS - Cross Site Scripting
  - ZeroConf - Zero-configuration networking
  - ⊕ Notes for ZeroConf
    - Similar to DNS-SD
  - ZOOM - Perl extension implementing the ZOOM API for Information Retrieval
  - ZSET - Possibly refers to boldface Z or blackboard bold Z as seen in the following link
- AdventPlanet
  - ⊕ See also
    - An Aggregator of Advent Calendars
  - WWW::AdventCalendar - A calendar for a month of articles (on the web)
- AiEngines
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For ggml source code
    - For llama.cpp (uses ggml)
    - https://modelcontextprotocol.io/docs/getting-started/intro
    - Ollama lets you run various open source LLMs locally
  - Acme::Claude::Shell - AI-powered interactive shell using Claude Agent SDK
  - Acme::MCP - Cheap Model Context Protocol (MCP) Server
  - AI::ActivationFunctions - Activation functions for neural networks in Perl
  - AI::Agent::Skills::SiteKit - URL helpers for AI Agent Skills
  - AI::Chat - Interact with AI Chat APIs
  - Alien::ggml - Find or build the ggml tensor library
  - App::Chit - Chat with AI from the command line
  - AI::Ollama::Client - Client for AI::Ollama (not on CPAN)
  - App::Raider - Autonomous CLI agent that can browse directories, edit files, and run bash commands
  - ⊕ Notes for App::Raider
    - Uses AI engine Langertha
  - Chorus - Perl inference engine and AI-assisted compliance-checking platform
  - Claude::Agent - Perl SDK for the Claude Agent SDK
  - Claude::Agent::Code::Refactor - Automated code refactoring with review-fix loops
  - Claude::Agent::Code::Review - AI-powered code review using Claude
  - FacialHarmonyAI::SiteKit - URL helpers and metadata for FacialHarmonyAI
  - Langertha - The clan of fierce vikings with ðª and ð¡ï¸ to AId your rAId
  - ⊕ Notes for Langertha
    - This module is designed to facilitate interactions with various AI models
  - Langertha::Knarr - LLM Proxy with Langfuse Tracing
  - Langertha::Raider - Autonomous agent with conversation history and MCP tools
  - ⊕ Notes for Langertha::Raider
    - See App::Raider
  - Langertha::Skeid - Dynamic routing control-plane for multi-node LLM serving with normalized metrics and cost accounting
  - LLM::SimpleClient - Perl module for making single API requests to LLM providers
  - Lugh - Pure C LLM Inference Engine for Perl (built on ggml)
  - MCP - Model Context Protocol Perl SDK
  - MCP::Run - MCP server with a command execution tool
  - MCP::Server - MCP server implementation
  - MCP::Server::Run - MCP server with a command execution tool
  - MCP::Wiki - Markdown wiki MCP server with TOC extraction and git history
  - Net::Async::Crawl4AI - IO::Async Crawl4AI client with an async strategy chain
  - Net::Async::Firecrawl - IO::Async Firecrawl v2 client with flow helpers
  - ⊕ Notes for Net::Async::Firecrawl
    - See also WWW::Firecrawl below
  - Net::Gemini - A small gemini client
  - ⊕ Notes for Net::Gemini
    - See also TheRFCGuide for rfc2045
  - OpenAPI::Client::OpenAI - A client for the (Microsoft) OpenAI API
  - ProductShotAI::SiteKit - Public URL helpers for ProductShot AI
  - Sim::AgentSoar - SOAR-inspired explicit search with a pluggable LLM worker
  - Sim::Agent - Deterministic, file-backed orchestration of LLM workers and critics via a small S-expression DSL
  - WebService::Chroma - Chromadb client
  - ⊕ Notes for WebService::Chroma
    - Chroma is the AI-native open-source vector database. Chroma makes it easy to build LLM apps by making knowledge, facts, and skills pluggable for LLMs
    - https://docs.trychroma.com/docs/overview/getting-started
  - WebService::Ollama - Ollama client
  - Wordsmith::Claude - AI-powered text rewriting with style
  - WWW::Crawl4AI - Perl client and fallback orchestrator for Crawl4AI
  - WWW::Firecrawl - Firecrawl v2 API bindings (self-host first, cloud compatible)
  - ⊕ Notes for WWW::Firecrawl
    - https://www.firecrawl.dev/
    - See also Net::Async::Firecrawl above
  - WWW::VastAI - Perl client for the Vast.ai REST APIs
- AlgorithmicStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Action::Retry - Module to try to perform an action, with various ways of retrying and sleeping between retries
  - Action::Retry::Strategy::Constant - Constant sleep time strategy
  - Action::Retry::Strategy::Fibonacci - Fibonacci incrementation of sleep time strategy
  - Action::Retry::Strategy::Linear - Linear incrementation of sleep time strategy
  - Algorithm::Backoff - Various backoff strategies for retry
  - Algorithm::Backoff::Constant - Backoff using a constant delay
  - Algorithm::Backoff::Exponential - Backoff exponentially
  - Algorithm::Backoff::Fibonacci - Backoff using Fibonacci sequence
  - Algorithm::Backoff::LILD - Linear Increment, Linear Decrement (LILD) backoff
  - Algorithm::Backoff::LIMD - Linear Increment, Multiplicative Decrement (LIMD) backoff
  - Algorithm::Backoff::MILD - Multiplicative Increment, Linear Decrement (MILD) backoff
  - Algorithm::Backoff::MIMD - Multiplicative Increment, Multiplicative Decrement (MIMD) backoff
  - Algorithm::Backoff::RetryTimeouts - A backoff-style retry algorithm with adjustable timeout support
  - Algorithm::Classifier::NaiveBayes - A multinomial naive Bayes text classifier with Laplace smoothing
  - Algorithm::Classifier::IsolationForest - Unsupervised anomaly detection via Isolation Forest or Extended Isolation Forest
  - ⊕ Notes for Algorithm::Classifier::IsolationForest
    - https://www.researchgate.net/publication/224384174_Isolation_Forest
  - Algorithm::EventsPerSecond - A sliding-window events-per-second rate counter with a optional XS backend
  - Algorithm::ToNumberMunger - Compile declarative specs into closures that munge raw values into numbers
  - Algorithm::X::DLX - Solve exact cover problems with Algorithm-X and Dancing Links
  - Algorithm::DLX - Solve exact cover problems
  - App::AlgorithmBackoffUtils - Utilities related to Algorithm::Backoff
  - Inline::CLIPS - Perl interface to run CLIPS programs
  - Retry::Backoff - Retry a piece of code, with backoff strategies
  - Retry::Policy - Simple retry wrapper with exponential backoff and jitter
- AnimationStuff
  - App::FfmpegUtils - Utilities related to ffmpeg
  - Automate::Animate::FFmpeg - Create animation from a sequence of images using FFmpeg
- AntiVirusStuff
  - Alien::YARA - Find or download and install the YARA malware analysis library
  - File::Scan::ClamAV - Connect to a local Clam Anti-Virus clamd service and send commands
  - YaraFFI - Minimal Perl FFI bindings for the YARA malware scanning engine
  - ⊕ Notes for YaraFFI
    - https://yara.readthedocs.io/en/latest/
- ApacheStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Apache::Log::Parser - Parser for Apache Log (common, combined, and any other custom styles by LogFormat)
  - ApacheLog::Parser - Parse apache 'combined' log format
  - Apache::ParseLog - Object-oriented Perl extension for parsing Apache log files
  - Apache::Session - A persistence framework for session data
  - Apache::Session::Browseable - Add index and search methods to Apache::Session
  - ⊕ Notes for Apache::Session::Browseable
    - Written to support Lemonldap::NG. See SystemMonitoring
  - Apache::Session::Generate::Random - Use system randomness for generating session ids
  - Apache2::API - Apache2 API Framework
  - Avro - The official Perl API for the Apache Avro project's serialization and RPC framework
  - Clownfish - Apache Clownfish symbiotic object system
  - Clownfish::CFC - Compiler for Apache Clownfish
  - Common::Log::Parser - Parse the common log format lines used by Apache
  - Dezi::App - Build Dezi search applications
  - ModPerl::RegistryCookerSealed - Monkey-patch :Sealed registry handler() into ModPerl::RegistryCooker
  - Net::API::REST - Framework for RESTful APIs
  - Net::Kafka::Producer::Avro - Apache Kafka message producer based on librdkafka, Avro serialization and Confluent Schema Registry validation
  - Regexp::Log::Common - A regular expression parser for the Common Log Format
  - ThreatDetector - Apache log parser for threat detection & classification
  - Thrift - Apache Thrift is a software framework for scalable cross-language services development.
  - Thrift::XS - Faster Thrift binary protocol encoding and decoding
- AppleMac
  - ⊕ See also
    - [Topic]
  - Apple::AppStoreConnect - Apple App Store Connect API client
  - Mac::FSEvents - Monitor a directory structure for changes
  - Mac::OSVersion - Get the Mac OS X or macOS system version
  - Mac::Pasteboard - Manipulate Mac OS X clipboards/pasteboards
  - Mac::PropertyList - Work with Mac plists at a low level
- ArchiveFiles
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - ftp://ftp.info-zip.org/pub/infozip/doc/ - For zip file details
    - https://metacpan.org/dist/IO-Compress/view/lib/IO/Compress/FAQ.pod
    - https://msgpack.org/
    - For zip file details
    - For info re bzip2
    - For I/O operators
    - For lzf
    - AES Encryption Information
  - Alien::ultraviolet - Alien package for Python uv
  - Archive::7zip - Read/write 7z, zip, ISO9960 and other archives
  - Archive::CAR - Content Addressable Archive (CAR) reader and writer
  - Archive::Extract - A generic archive extracting mechanism
  - Archive::Lha - Read and extract .LZH/.LHA archives
  - Archive::Libarchive::Compress - Recursively archive a directory (using libarchive)
  - ⊕ Notes for Archive::Libarchive::Compress
    - Contains many modules
  - Archive::Libarchive::Peek - Peek into archives without extracting them
  - Archive::Tar::Stream - Pure Perl IO-friendly tar file management
  - Archive::SCS - SCS archive controller
  - Archive::Tar - Module for manipulations of tar archives
  - Archive::Tar::Wrapper - API wrapper around the 'tar' utility
  - ⊕ Notes for Archive::Tar::Wrapper
    - This module differs from Archive::Tar in 2 ways
  - Archive::Unzip::Burst - Featureless but fast ZIP extraction
  - Archive::Zip - Provide an interface to ZIP archive files
  - Archive::Zip::SimpleZip - Create Zip Archives
  - ⊕ Notes for Archive::Zip::SimpleZip
    - Supports deflate, store, bzip2, Zstandard (Zstd), Xz and lzma compression
    - Contains Archive::Zip::SimpleUnzip
  - Archive::Zip::SimpleUnzip - Read Zip Archives
  - ⊕ Notes for Archive::Zip::SimpleUnzip
    - Supports deflate, store, bzip2, Zstandard (Zstd), Xz and lzma compression
    - Contained in Archive::Zip::SimpleZip
  - App::zipdetails - Display the internal structure of zip files
  - ⊕ Notes for App::zipdetails
    - The zipinfo program that comes with the info-zip distribution (http://www.info-zip.org/) can also display details of the structure of a zip file
  - gb64 - Fast Pure Perl Base64 Encoding and Decoding
  - Compress::Raw::Bzip2 - Low-Level Interface to bzip2 compression library
  - Compress::Raw::Lzma - Low-Level Perl Interface to lzma compression library
  - Compress::Raw::Zlib - Low-Level Interface to zlib or zlib-ng compression library
  - Compress::Stream::Zstd - Perl interface to the Zstd (Zstandard) (de)compressor
  - ⊕ Notes for Compress::Stream::Zstd
    - Works with IO::Compress::Zstd
  - Compress::Zlib - Interface to zlib compression library
  - Compress::Zstd - Perl interface to the Zstd (Zstandard) (de)compressor
  - ⊕ Notes for Compress::Zstd
    - No dictionary support but support ticket has sample code
    - But see Compress::Stream::Zstd
  - Compression::Util - Implementation of various techniques used in data compression
  - File::Unpack2 - A strong bz2/gz/zip/tar/cpio/rpm/deb/cab/lzma/7z/rar/... archive unpacker, based on mime-types
  - FU::Utils - Miscellaneous Utility Functions
  - ⊕ Notes for FU::Utils
    - Supports booleans, brotli, file descriptor passing, gzip, HTTP dates and json
  - Gzip::Faster - Simple and fast gzip and gunzip
  - Gzip::Libdeflate - Libdeflate compression library
  - ⊕ Notes for Gzip::Libdeflate
    - This module provides an interface to libdeflate
    - It offers the same deflate form of compression as zlib, as used in gzip, libpng etc
    - This distribution includes libdeflate, so it is not necessary to have it on your system
  - Gzip::RandomAccess - Extract arbitrary bits of a gzip stream
  - IO::Compress - Is an interface to zlib compression library
  - ⊕ Notes for IO::Compress
    - Contains streamzip to create a zip file from stdin
    - Contains zipdetails to display the internal structure of zip files
  - IO::Compress::Base - Base Class for IO::Compress modules
  - IO::Compress::Brotli - Write Brotli buffers/streams
  - IO::Compress::Bzip2 - Write bzip2 files/buffers
  - ⊕ Notes for IO::Compress::Bzip2
    - See also IO::Uncompress::Bunzip2
  - IO::Compress::Deflate - Write RFC 1950 files/buffers
  - ⊕ Notes for IO::Compress::Deflate
    - See TheRFCGuide for rfc1950
  - IO::Compress::FAQ - Frequently Asked Questions about IO::Compress
  - IO::Compress::Gzip - Write RFC 1952 files/buffers
  - ⊕ Notes for IO::Compress::Gzip
    - See also IO::Uncompress::Gunzip
    - See TheRFCGuide for rfc1952
  - IO::Compress::Lzf - Write lzf files/buffers
  - IO::Compress::Lzip - Write lzip files/buffers
  - ⊕ Notes for IO::Compress::Lzip
    - Contains IO::Compress::Lzma and IO::Compress::Xz and the 3 uncompressers too
  - IO::Compress::Lzma - Write lzma files/buffers
  - IO::Compress::Lzop - Write lzop files/buffers
  - IO::Compress::RawDeflate - Write RFC 1951 files/buffers
  - ⊕ Notes for IO::Compress::RawDeflate
    - See RfGuide for rfc1951
  - IO::Compress::Xz - Write xz files/buffers
  - IO::Compress::Zip - Write zip files/buffers
  - ⊕ Notes for IO::Compress::Zip
    - Supports store, deflate, bzip2, lzma, xz, zstd
  - IO::Compress::Zstd - Write zstd files/buffers
  - IO::Uncompress::Bunzip2 - Read bzip2 files/buffers
  - IO::Uncompress::Gunzip - Read RFC 1952 files/buffers
  - ⊕ Notes for IO::Uncompress::Gunzip
    - See TheRFCGuide for rfc1952
  - IO::Uncompress::RawInflate - Read RFC 1951 files/buffers
  - ⊕ Notes for IO::Uncompress::RawInflate
    - See TheRFCGuide for rfc1951
  - IO::Uncompress::UnLzma - Read lzma files/buffers
  - IO::Uncompress::UnXz - Read xz files/buffers
  - IO::Uncompress::Unzip - Read zip files/buffers
  - IO::Zlib - IO:: style interface to Compress::Zlib
  - MsgPack::Raw - Perl bindings to the msgpack C library
  - PAR - Perl Archive Toolkit
  - ⊕ Notes for PAR
    - This module lets you use special zip files, called Perl Archives, as libraries from which Perl modules can be loaded
  - PAR::Packer - PAR Packager
  - ⊕ Notes for PAR::Packer
    - This module implements the App::Packer::Backend interface, for generating stand-alone executables, perl scripts and PAR files
  - Sereal - Fast, compact, powerful binary (de-)serialization
  - Sereal::Decoder - Fast, compact, powerful binary deserialization
  - Sereal::Encoder - Fast, compact, powerful binary serialization
  - Stream - Provide input & output encoding & decoding
  - ⊕ Notes for Stream
    - Used by Hypersonic
  - streamzip - Create a zip file from stdin
  - ⊕ Notes for streamzip
    - Supports store, deflate, bzip2, lzma, xz, zstd
  - XS::libbrotli - Brotli compression library for XS.
- ArchOS
  - ⊕ See also
    - [Topic]
  - App::cpan2arch - Generate PKGBUILD from CPAN metadata
- ArrayHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Array::Autojoin - Arrayrefs that stringify as join(", ", @$it)
  - Array::Circular - Provide an array data structure that can go around in circles
  - Array::Compare - Perl extension for comparing arrays
  - Array::Diff - Find the differences between two arrays
  - Array::Intersection - Exports an array intersection function
  - Array::Iterator - A simple class for iterating over Perl arrays
  - ⊕ Notes for Array::Iterator
    - Other modules discussed in the POD: Class::Iter, Class::Iterator, Data::Iter, Data::Iterator::EasyObj and Tie::Array::Iterable
  - Array::Iterator::Circular - This iterator will loop continuously as long as next or get_next is called
  - Array::Join - Performs SQL-like joins on arrays
  - Array::Merge::Unique - Merge those arrays uniquely
  - ⊕ Notes for Array::Merge::Unique
    - See also List::MoreUtils
  - Array::Objectify - Objectify an array
  - Array::PseudoScalar - Arrays that behave like scalars
  - Array::Transpose - Transposes a 2-Dimensional Array
  - Data::LnArray - The great new Data::LnArray
  - ⊕ Notes for Data::LnArray
    - Arrays with lots of access methods
  - Data::LnArray::XS - Arrays as just above
  - Data::Table - Data type related to database tables, spreadsheets, CSV/TSV files, HTML table displays, etc
  - HATX - A fluent interface for Hash and Array Transformations
  - List::MoreUtils - Provide the stuff missing in List::Util
  - List::UtilsBy - Higher-order list utility functions
  - ⊕ Notes for List::UtilsBy
    - Amazing!
  - Math::MatrixBool - Matrix of Booleans
  - Math::MatrixReal - Matrix of Reals
  - Syntax::Operator::Zip - Infix operator to compose two lists together
  - ⊕ Notes for Syntax::Operator::Zip
    - Provides 2 functions: mesh and zip, both of which are in List::Util
    - Also, List::UtilsBy contains zip_by and unzip_by
- AsciiCodes
  - ⊕ See also
    - [Topic]
    - https://www.ascii-code.com/
  - Text::ASCII::Convert - Perl module to convert non-ASCII characters to their ASCII equivalents
- ASN
  - Convert::ASN1 - ASN.1 Encode/Decode library
  - Convert::PEM - Read/write encrypted ASN.1 PEM files
- AssemblerX86
  - ⊕ See also
    - [Topic]
  - CPU::x86_64::InstructionWriter - Assemble x86-64 instructions using a pure-perl API
- AstroStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://www.heavens-above.com/
    - https://www.universalworkshop.com/
  - Astro::App::Satpass2 - Forecast satellite visibility
  - Astro::Coord::ECI - Manipulate geocentric coordinates
  - Astro::Coord::ECI::TLE::Iridium - Compute behavior of Iridium satellites
  - Astro::Coord::ECI::VSOP87D - Implement the VSOP87D planetary position model
  - Astro::Coords - Class for handling astronomical coordinates
  - Astro::Nova - Perl interface to libnova
  - Astro::PAL - Perl interface to Starlink PAL positional astronomy library
  - Astro::SIMBAD::Client - Fetch astronomical data from SIMBAD 4
  - Astro::SpaceTrack - Retrieve orbital data from www.space-track.org
  - Astro::Sunrise - Perl extension for computing the sunrise/sunset on a given day
  - Astro::Telescope - Class for obtaining telescope information
  - Astro::UTDF - Manipulate Universal Tracking Data Format data
  - Physics::CPD - Computational Plasma Dynamics: fundamental magnetised-plasma parameters
- AudioVisual
  - ⊕ See also
    - [Topic]
    - https://www.videolan.org/vlc/libvlc.html
  - App::SubtitleUtils - Utilities related to video subtitles
  - Audio::Nama - Multitrack recorder and digital audio workstation
  - Audio::Scan - Fast C metadata and tag reader for all common audio file formats
  - Audio::StreamGenerator - Create a 'radio' stream by mixing ('cross fading') multiple audio sources (files or anything that can be converted to PCM audio) and sending it to a streaming server (like Icecast)
  - Media::Convert - A Moose-based library to work with media assets
  - Media::Info - Return information on media file/URL
  - Perl I/F - Wrapper for libvlc.so
  - SpeL::Wizard - Engine to build audio files from the spel files generated by SpeL
  - SReview - A video review and transcoding system
  - ⊕ Notes for SReview
    - This is a complex package containing about 50 modules and a dozen scripts
  - SWF - An autoloadable interface module for Ming - a library for generating ShockWave Flash format movies
  - SWF::Builder - Create SWF movie
  - SWF::File - Create SWF file
  - Video::NRK::Cache - Cache NRK Video on Demand broadcasts for offline viewing
  - VideoLAN::LibVLC - Wrapper for libvlc.so
  - VLC media player - VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols
- AutoCAD
  - ⊕ See also
    - https://en.wikipedia.org/wiki/AutoCAD_version_history
  - App::Test::DWG::LibreDWG::DwgRead - Base class for test-dwg-libredwg-dwgread script
  - CAD::AutoCAD::Detect - Detect AutoCAD files through magic string
  - CAD::Format::DWG::Version - Class for work with DWG file versions
  - File::Find::Rule::DWG - Common rules for searching DWG files
- BarCodes
  - ⊕ See also
    - EAN, or EAN13, stands for International Article Number
  - Business::Barcode::EAN13 - Perform simple validation of an EAN-13 barcode
  - GD::Barcode - Create barcode image with GD
  - Net::EANSearch - Perl module for EAN and ISBN lookup and validation using the API on https://www.ean-search.org
- BenchmarkingTools
  - ⊕ See also
    - [Topic]
    - [Topic]
    - Mean Absolute Deviation
    - Hyperfine
  - Benchmark - Benchmark running times of Perl code
  - Benchmark::DKbench - Perl CPU Benchmark Suite
  - Benchmark::MCE - Perl multi-core benchmarking framework
  - Benchmark::Thread::Size - Report size of threads for different code approaches
  - Devel::NYTProf - Powerful fast feature-rich Perl source code profiler
  - Dumbbench - More reliable benchmarking with the least amount of thinking
  - Number::WithError - Numbers with error propagation and scientific rounding
  - Surveyor::App - Run benchmarks from a package
- BibliographicStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - Library of Congress Marc Standards
    - http://www.loc.gov/standards/marcxml/
    - For the ZOOM Abstract API
  - App::isbn - Query book information by ISBN
  - App::MARC::Field008 - Base class for marc-field008 tool
  - App::MARC::Filter - Base class for marc-count script
  - App::MARC::Leader - Base class for marc-leader tool
  - App::MARC::List - Base class for marc-list script
  - App::MARC::Record::Stats - Base class for marc-record-stats script
  - App::MARC::Validator - Tool to validate records in MARC file
  - App::MARC::Validator::Report - Tool to process MARC validation report
  - App::NKC2ISBD - Base class for nkc-to-marc script.
  - App::NKC2MARC - Tool to fetch record from National library of the Czech Republic to MARC file
  - BibTeX::Parser - A pure perl BibTeX parser
  - Business::ISBN - Work with International Standard Book Numbers
  - ⊕ Notes for Business::ISBN
    - Contains Business::ISBN10 and Business::ISBN13
  - Business::ISBN::Data - Data pack for Business::ISBN
  - Business::UDC - Class to work with Universal Decimal Classification
  - Data::MARC::Field008 - Data object for MARC field 008
  - Data::MARC::Leader - Data object for MARC leader
  - Data::MARC::Validator::Report - Data object for MARC validator report
  - Qiime2::Artifact - A parser for Qiime2 artifact files
  - MARC - Perl extension to manipulate MAchine Readable Cataloging records
  - MARC::Charset - Convert MARC-8 encoded strings to UTF-8
  - MARC::Convert::Wikidata::Object - Bibliographic Wikidata object defined by MARC record
  - MARC::Field008 - Class for parsing and serialization of MARC field 008
  - MARC::Field008::L10N - Localization framework for MARC::Field008
  - MARC::Field008::Print - MARC 008 field class for print
  - MARC::File::USMARC - USMARC-specific file handling
  - MARC::File::XML - Work with MARC data encoded as XML
  - MARC::Leader - MARC leader class
  - MARC::Leader::L10N - Localization framework for MARC::Leader
  - MARC::Leader::Print - MARC Leader class for print
  - MARC::Leader::Utils - Utilities for MARC::Leader
  - MARC::Lint - Perl extension for checking validity of MARC records
  - MARC::Record - Perl extension for handling MARC records
  - MARC::Record::Stats - Scans one or many MARC::Record and gives a statistics on the tags and subtags
  - MARC::Validator - Set of plugins for MARC validation
  - Marc::Validator::Filter - MARC validator filter plugins
  - Net::Z3950::FOLIO - Z39.50 server for FOLIO bibliographic data
  - ⊕ Notes for Net::Z3950::FOLIO
    - Uses Net::Z3950::SimpleServer
  - Net::Z3950::SimpleServer - Simple Perl API for building Z39.50 servers
  - NKC::Transform::BIBFRAME2MARC - bibframe2marc transformation class
  - NKC::Transform::BIBFRAME2MARC::Utils - Utilities for bibframe2marc transformations
  - NKC::Transform::MARC2BIBFRAME - marc2bibframe transformation class
  - NKC::Transform::MARC2RDA - marc2rda transformation class
  - WWW::Scraper::ISBN - Retrieve information about books from online sources
  - ZOOM - Perl extension implementing the ZOOM API for Information Retrieval
  - ⊕ Notes for ZOOM
    - Contains Net::Z3950::ZOOM
- BillOfMaterials
  - App::CPAN::SBOM - CPAN SBOM (Software Bill of Materials) generator
  - SBOM::CycloneDX - A library for generate valid CycloneDX BOM file
- BioInformatics
  - ⊕ See also
  - Bio::EnsEMBL - API to connect to and work with EnsEMBL genomic databases
  - Bio::Monophylizer - Assesses taxonomic monophyly on Barcode of Life trees
  - Bio::MUST::Apps::OmpaPa - Main class for ompa-pa tool
  - Bio::MUST::Core - Core classes and utilities for Bio::MUST
  - ⊕ Notes for Bio::MUST::Core
    - Contains about 35 scripts
  - Bio::MUST::Drivers - Bio::MUST classes for driving external programs
  - Bio::Phylo - Phylogenetic analysis using perl
  - Bio::ToolBox - Tools for querying and analysis of genomic data
  - ClarID::Tools - A Human-Readable and Compact Identifier Specification for Biomedical Metadata Integration
  - Convert::Pheno - A module to interconvert common data models for phenotypic data
  - IFNGENO::GenoPheno::Utils - In lib/IFNGENO/GenoPheno/Utils.pm
  - Pheno::Ranker - A module that performs semantic similarity in PXF/BFF data structures and beyond (JSON|YAML)
  - ⊕ Notes for Pheno::Ranker
    - https://cnag-biomedical-informatics.github.io/pheno-ranker/
- BlockChain
  - Blockchain::Ethereum - A Ethereum toolkit in Perl
  - Web3::Tiny - A small, dependency-light way to talk to Ethereum from Perl
- BloggingPackages
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Plerd - Ultralight blogging with Markdown and Dropbox
- BoneMarrrowDonorRegistry
  - ⊕ See also
    - [Topic]
    - https://zkrd.de/
  - EMDIS::ECS - ECS utility module
- BotStuff
  - Bot::IRC - Yet Another IRC Bot
  - Bot::IRC::X::Dice - Bot::IRC plugin for dice rolling
  - Bot::IRC::X::Feeds - Bot::IRC plugin to watch and notify on changes in RSS feeds
  - Bot::IRC::X::ManagementSpeak - Bot::IRC plugin for rendering management-speak
  - Bot::IRC::X::Message - Bot::IRC plugin for leaving messages for nicks
  - Bot::IRC::X::MetarTaf - Bot::IRC plugin for METAR and TAF reporting
  - Bot::IRC::X::Reminder - Bot::IRC plugin for scheduling reminders
  - Bot::IRC::X::Retort - Bot::IRC plugin for bot-retorting to key words
  - Bot::IRC::X::Time - Bot::IRC plugin for some time functions
  - Bot::IRC::X::UriTitle - Bot::IRC plugin to parse and print URI titles
  - Bot::IRC::X::WwwShorten - Bot::IRC plugin for automatic URL shortening
  - Eliza::Chatbot - Eliza chatbot
- BrowserStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
  - App::check_pherkin - Check_pherkin command interface
  - App::FirefoxMultiAccountContainersUtils - Utilities related to Firefox Multi-Account Containers add-on
  - App::FirefoxUtils - Utilities related to Firefox
  - App::LinkSite - Create a website listing all of your links
  - App::pherkin - Run Cucumber tests from the command line
  - Chrome::Util::Profile - List available Google Chrome profiles
  - Firefox::Marionette - Automate the Firefox browser with the Marionette protocol
  - ⊕ Notes for Firefox::Marionette
    - https://firefox-source-docs.mozilla.org/testing/marionette/Protocol.html
  - Firefox::Util::Profile - Given a Firefox profile name, return its directory
  - Mozilla::CA - Mozilla's CA cert bundle in PEM format
  - MozRepl - Perl interface of MozRepl
  - Pherkin::Extension::Weasel - Pherkin extension for web-testing
  - Selenium::Firefox - Use FirefoxDriver without a Selenium server
  - Selenium::Remote::Driver - Perl Client for Selenium Remote Driver
  - Vivaldi::Util::Profile - List available Vivaldi profiles
  - Weasel - Perl's php/Mink-inspired abstracted web-driver framework
  - Weasel::Driver::Selenium2 - Weasel driver wrapping Selenium::Remote::Driver
  - Weasel::Driver::Selenium4 - Weasel driver wrapping Selenium::Client
  - WWW::Mechanize::Chrome - Automate the Chrome browser
  - WWW::Mechanize::Chrome::DOMops - Operations on the DOM loaded in Chrome
  - WWW::Mechanize::Firefox - Use Firefox as if it were WWW::Mechanize
  - ⊕ Notes for WWW::Mechanize::Firefox
    - Recommends MozRepl, above
- BsdWare
  - ⊕ See also
    - [Topic]
  - BSD::Resource - BSD process resource limit and priority functions
  - PerlPowerTools - Power Tools (BSD utilities in pure Perl)
  - ⊕ Notes for PerlPowerTools
    - In rare cases these use different options or work differently than standard Linux tools, which can lead to confusion if they and the Linux versions are both on your PATH. I personally deleted them when I hit this problem (or rather, it hit me)
- BusinessApps
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://lccn.loc.gov/
    - https://www.loc.gov/marc/lccn_structure.html
    - https://www.loc.gov/standards/uri/info.html
    - https://www.iso20022.org/
  - API::Eulerian - Simple interface for all the API provided by Eulerian Technologies
  - App::karr - Kanban Assignment & Responsibility Registry
  - BankAccount::Validator::UK -
  - Business::BR::NFSe - Consulta e emissÃ£o de NFS-e (Nota Fiscal de ServiÃ§os EletrÃ´nica) via API REST do Emissor Nacional (Sefin)
  - Business::CAMT - ISO20022 Cash Management (CAMT) messages
  - Business::ES::CodigoPostal - ValidaciÃ³n de cÃ³digos postales espaÃ±oles y obtenciÃ³n de provincia
  - Business::ES::NIF - Validate Spanish NIF, NIE and CIF numbers
  - Business::GoCardless - Top level namespace for the Business::GoCardless set of modules
  - Business::ISSN - Perl extension for International Standard Serial Numbers
  - Business::KontoCheck - Perl extension for checking German and Austrian Bank Account Numbers
  - Business::LCCN - Work with Library of Congress Control Number (LCCN) codes
  - Business::NAB - Business::NAB is the top level namespace for the various modules that are used to parse/create the file formats used for interchange with NAB
  - Business::Tax::US::Form_1040::Worksheets - IRS Form 1040 worksheets calculations
  - Business::Tax::VAT::Validation - Validate EU VAT numbers against VIES/HMRC
  - Business::UPS - A UPS Interface Module
  - Business::US::USPS::IMB - Perl Binding for usps4cb
  - Business::Westpac - Top level namespace for the Business::Westpac set of modules
  - Data::Currency - Provides basic currency formatting and conversion
  - Data::Money - Money/currency with formatting and overloading.
  - Data::MoneyCurrency - Get information for different currencies
  - EAI::Wrap - Framework for easy creation of Enterprise Application Integration tasks
  - ⊕ Notes for EAI::Wrap
    - Functionality: DB, DateUtil, FTP and File
  - Finance::Calendar - Represents the trading calendar
  - Finance::Currency::Convert - Convert currencies and fetch their exchange rates (with Finance::Quote)
  - Finance::Currency::Convert::WebserviceX - Lightweight currency conversion using WebserviceX.NET
  - Finance::Exchange - Represents a financial stock exchange object.
  - Finance::GDAX::API::Currency - Currencies
  - Finance::Google::Portfolio - Manipulate Google Finance portfolios a little
  - Finance::MIFIR::CONCAT - Provides CONCAT code generation out of client data according to MIFIR rules
  - Finance::Quote - Get stock and mutual fund quotes from various exchanges
  - Finance::Tax::Aruba - A package that deals with tax calculations for Aruba
  - Finance::Tiller2QIF - Convert Tiller CSV exports to QIF for import into Financial software like GnuCash, KMyMoney, Quicken, HomeBank, Money Manager Ex and many others
  - LedgerSMB::Installer - LedgerSMB is a free web-based double-entry accounting system
  - ⊕ Notes for LedgerSMB::Installer
    - https://github.com/ledgersmb/LedgerSMB
  - Lib::Pepper - Perl bindings for the Pepper payment terminal library
  - Locale::Currency - Module for dealing with currency code sets
  - Locale::Currency::Format - Perl functions for formatting monetary values
  - masser::home - Masser is a perl-based fastcgi-driven application framework. Not a Perl module
  - Math::Currency - Exact Currency Math with Formatting and Rounding
  - NBI::Slurm - NBI Slurm module
  - ⊕ Notes for NBI::Slurm
    - SLURM stands for Simple Linux Utility for Resource Management
    - Debian via apt has available 7 basic components of SLURM
  - Net::PayPal::Lite - Unofficial Perl extension for PayPal's REST API (Lite version)
  - Net::Stripe - API client for Stripe.com
  - ⊕ Notes for Net::Stripe
    - https://stripe.com/au
  - oEdtk - A module for industrial printing processing
  - PDK::Utils - Provides utility functions for managing and parsing PDK configuration contexts
  - WWW::PayPal - Perl client for the PayPal REST API
  - ⊕ Notes for WWW::PayPal
    - https://developer.paypal.com/docs/api/orders/v2/
    - https://github.com/paypal/paypal-rest-api-specifications
  - WWW::Salesforce - This class provides a simple SOAP client for Salesforce.com
- CachingStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - For Melian the sever
    - A great HOWTO
  - BerkeleyDB - Perl extension for Berkeley DB version 2, 3, 4, 5 or 6
  - ⊕ Notes for BerkeleyDB
    - (Cache::FastMmap says) Very fast (data ends up mostly in shared memory cache) but acts as a database overall, so data is not automatically expired
  - Cache::Cache - The Cache interface
  - ⊕ Notes for Cache::Cache
    - But see CHI, Cache::FastMmap below
  - Cache::FastMmap - Uses an mmap'ed file to act as a shared memory interprocess cache
  - Cache::FileCache - Iimplements the Cache interface
  - ⊕ Notes for Cache::FileCache
    - (Cache::FastMmap says) Lots of features, slow
  - Cache::File::Simple - Dead simple file based caching meachanism
  - Cache::Memcached::Fast - Perl client for memcached, in C language
  - ⊕ Notes for Cache::Memcached::Fast
    - The API is largely compatible with Cache::Memcached, the original pure Perl client
    - See Debian.Wiki.html's Installation para for installation of memcached
    - See http://www.memcached.org for the memory cache daemon
  - Cache::Memcached::Fast::Safe - Cache::Memcached::Fast with sanitizing keys and fork-safe
  - Cache::Memcached::PDeque - Implements a priority deque using memcached as storage
  - ⊕ Notes for Cache::Memcached::PDeque
    - This is an implementation of a double-ended queue, with support for priorities
    - Implements the Cache interface
    - https://metacpan.org/pod/Cache::MemoryCache
    - But see CHI., Cache::FastMmap below
  - Cache::Mmap - Shared data cache using memory mapped files
  - ⊕ Notes for Cache::Mmap
    - (Cache::FastMmap says) Similar to Cache::FastMmap, in pure perl. slows down with larger pages
  - Cache::SharedMemoryCache - Extends the MemoryCache class
  - ⊕ Notes for Cache::SharedMemoryCache
    - (Cache::FastMmap says) Lots of features, VERY slow. Uses IPC::ShareLite which freeze/thaws ALL data at each read/write
  - CHI - Unified cache handling interface
  - ⊕ Notes for CHI
    - The successor to Cache::Cache
  - CHI::Driver::SharedMem - Cache data in shared memory
  - Class::Simple::Cached - Cache messages to an object
  - Class::Simple::Readonly::Cached - Cache messages to an object
  - Data::BitSet::Shared - Shared-memory fixed-size bitset for Linux
  - Data::BloomFilter::Shared - Shared-memory Bloom filter for Linux
  - Data::Buffer - Read/write buffer class
  - Data::Buffer::Shared - Type-specialized shared-memory buffers for multiprocess access
  - Data::CountingBloomFilter::Shared - Shared-memory counting Bloom filter for Linux
  - Data::CountMinSketch::Shared - Shared-memory Count-Min sketch for Linux
  - Data::CuckooFilter::Shared - Shared-memory Cuckoo filter for Linux
  - Data::DDSketch::Shared - Shared-memory DDSketch relative-error quantile sketch
  - Data::Deque::Shared - Shared-memory double-ended queue for Linux
  - Data::DisjointSet::Shared - Shared-memory union-find (disjoint-set) for Linux
  - Data::Fenwick::Shared - Shared-memory Fenwick tree (binary indexed tree; point or range update) for Linux
  - Data::Fenwick2D::Shared - Shared-memory 2-D Fenwick tree (binary indexed tree) for Linux
  - Data::Graph::Shared - Shared-memory directed weighted graph for Linux
  - Data::HashMap - Fast type-specialized hash maps implemented in C
  - Data::HashMap::Shared - Type-specialized shared-memory hash maps for multiprocess access
  - Data::Heap::Shared - Shared-memory binary min-heap (priority queue) for Linux
  - Data::HierTimingWheel::Shared - Shared-memory hierarchical timing wheel (O(1) timers at any delay)
  - Data::Histogram::Shared - Shared-memory HdrHistogram for Linux
  - Data::HyperLogLog::Shared - Shared-memory HyperLogLog cardinality estimator for Linux
  - Data::Intern::Shared - Shared-memory string interning table for Linux
  - Data::IntervalTree::Shared - Shared-memory interval tree (overlap / stabbing queries)
  - Data::KDTree::Shared - Shared-memory k-d tree (nearest-neighbour + range search)
  - Data::Log::Shared - Append-only shared-memory log (WAL) for Linux
  - Data::MinHash::Shared - Shared-memory MinHash sketch (Jaccard similarity estimation, b-bit signatures)
  - Data::NDArray::Shared - Shared-memory typed N-dimensional numeric array for Linux
  - Data::PubSub::Shared - High-performance shared-memory pub/sub for Linux
  - Data::Pool::Shared - Fixed-size shared-memory object pool for Linux
  - Data::PubSub::Shared - High-performance shared-memory pub/sub for Linux
  - Data::Queue::Shared - High-performance shared-memory MPMC queues for Linux
  - Data::RadixTree::Shared - Shared-memory compressed radix tree (prefix tree) for Linux
  - Data::ReqRep::Shared - High-performance shared-memory request/response IPC for Linux
  - Data::RingBuffer::Shared - Shared-memory fixed-size ring buffer for Linux
  - Data::RoaringBitmap::Shared - Shared-memory Roaring bitmap (compressed uint32 set) for Linux
  - Data::SortedSet::Shared - Shared-memory sorted set (ZSET) for Linux
  - Data::SpatialHash::Shared - Shared-memory spatial hash index for Linux
  - Data::Stack::Shared - Shared-memory LIFO stack for Linux
  - Data::Sync::Shared - Shared-memory synchronization primitives for Linux
  - DBI - Database independent interface for Perl
  - ⊕ Notes for DBI
    - (Cache::FastMmap says) Use your favourite RDBMS. can perform well, need a DB server running. very global. socket connection latency
  - File::Meta::Cache - Cache open file descriptors and stat meta data
  - HTTP::Cache::Transparent - Cache the result of http get-requests persistently
  - IPC::MM - Perl interface to Ralf Engelschall's mm library
  - ⊕ Notes for IPC::MM
    - (Cache::FastMmap says) Hash implementation is broken, data is not automatically expired, slow
  - LCC - Content Provider Modules for the Local Content Cache system
  - ⊕ Notes for LCC
    - See also https://sourceforge.net/projects/lococa/
  - Legba - Global slot storage implemented in XS
  - LRU::Cache - LRU cache with O(1) operation
  - Melian - Perl client to the Melian cache
  - ⊕ Notes for Melian
    - A quote from Gemini: Melian (the cache server by Sawyer X and Gonzalo Diethelm) is a fantastic addition to the "High Performance" section of your wiki. It uses a custom binary protocol over UNIX or TCP sockets for microsecond-level lookups - great companion to the modern Perl stack
  - Memoize - Make functions faster by trading space for time
  - Memoize::Expire - Plug-in module for automatic expiration of memoized values
  - MLDBM::Sync - Safe concurrent access to MLDBM databases
  - ⊕ Notes for MLDBM::Sync
    - (Cache::FastMmap says) Acts as a database, data is not automatically expired, slow
  - Net::Clacks - Fast client/server interprocess messaging and memcached replacement
  - Resource::Silo - Lazy declarative resource container for Perl
  - WWW::Mechanize::Cached - Cache response to be polite
- CaptchaStuff
  - ⊕ See also
  - Captcha::Cloudflare::Turnstile - A Perl implementation for Cloudflare Turnstile
  - Captcha::Stateless::Text - Stateless, text-based CAPTCHAs
  - Captcha::reCAPTCHA - A Perl implementation of the reCAPTCHA API version 0.99
  - Captcha::reCAPTCHA::V2 - A Perl implementation of reCAPTCHA API version 2
  - Captcha::reCAPTCHA::V3 - A Perl implementation of reCAPTCHA API version v3
- ChartingAndPlotting
  - ⊕ See also
    - [Topic]
    - [Topic]
    - Chart::Clicker
    - Chart::GGPlot
    - Chart::Plotly
    - [Topic]
    - Color::Library
    - Convert::Color
    - [Topic]
    - Imager::Plot
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - VS::Chart
    - https://echarts.apache.org/
    - https://en.wikipedia.org/wiki/Ggplot2
    - https://github.com/aluntzer/gtknodes/
    - https://plot.ly/javascript/reference/
  - Album - Create and maintain browser based photo albums
  - Alien::CFITSIO - Build and Install the CFITSIO library
  - ⊕ Notes for Alien::CFITSIO
    - See also https://heasarc.gsfc.nasa.gov/docs/software/fitsio/fitsio.html
  - Alien::GtkNodes - Find or install GtkNodes
  - App::BlurFill - A simple command line tool to create a blurred background image
  - ⊕ Notes for App::BlurFill
    - Command line access to a Dancer app
    - curl -OJ -X POST http://localhost:5000/blur -F "image=@input.jpg"
  - App::gimpgitbuild - Build GIMP from git
  - App::ImageMagickUtils - Utilities related to ImageMagick
  - App::Image::Generator - Perl class for image-generator application
  - App::imgsize - Show dimensions of image files
  - Cairo - Perl interface to the cairo 2d vector graphics library
  - Chart::ECharts - Apache ECharts wrapper for Perl
  - Data::Commons::Image - Data object for Wikimedia Commons image
  - Data::Image - Data object for image
  - File::LibMagic - Determine MIME types of data or files using libmagic
  - GD - Interface to Gd Graphics Library
  - GD::Polyline - Polyline object and Polygon utilities (including splines) for use with GD
  - GD::Simple - Simplified interface to GD library
  - ⊕ Notes for GD::Simple
    - Tutorial on usage at http://perlmaven.com/drawing-images-using-gd-simple
  - GD::SVG - Seamlessly enable SVG output from scripts written using GD
  - Gimp - Write GIMP extensions/plug-ins/load- and save-handlers in Perl
  - ⊕ Notes for Gimp
    - Git repo for the module is at https://gitlab.gnome.org/GNOME/gimp-perl
  - Gnuplot::Builder - Object-oriented gnuplot script builder
  - Graphics::Framebuffer - A Simple Framebuffer Graphics Library
  - Graphics::Penplotter::GcodeXY - Produce gcode files for pen plotters from Perl
  - HTML::D3 - A simple Perl module for generating bar charts using D3.js
  - Image::APNG - Generate Animated PNG (APNG) files from individual PNG images
  - Image::Base - Base class for loading, manipulating and saving images
  - Image::Base::GD - Draw images with GD
  - Image::Bitmap2Paths - Perl extension to convert line-drawing (and font's) bitmaps to paths (of vector formats)
  - Image::Dot - Create 1x1 pixel image files (pure-perl)
  - Image::Epeg - Thumbnail jpegs at lightning speed
  - Image::ExifTool - The command line tool exiftool has many, many options and supports a vast array of types
  - ⊕ Notes for Image::ExifTool
    - https://exiftool.org/
    - http://exiftool.sourceforge.net/
  - Image::ExifTool::TagNames - ExifTool tag name documentation
  - Image::Info - Extract meta information from image files
  - Image::JPEG::Size - Find the size of JPEG images
  - ImageMagick - sudo apt-get install imagemagick
  - ⊕ Notes for ImageMagick
    - Site has a list of exploits and many examples
  - Image::Magick::Safer - Wrap Image::Magick Read method to check magic bytes
  - Image::Magick::Thumbnail::PDF - Make thumbnail of a page in a pdf document
  - Image::MetaData::JPEG - Perl extension for showing/modifying JPEG (meta)data
  - ⊕ Notes for Image::MetaData::JPEG
    - But see Image::ExifTool
  - Image::PNG::Libpng - Perl interface to the C library libpng
  - Image::PNG::QRCode - ABANDONED - Make PNG images containing QR codes from your text
  - Image::Synchronize - Synchronize filesystem modification timestamps of images, movies, and related files
  - Image::ThumbHash - A very compact representation of an image placeholder
  - Imager - Perl extension for Generating 24 bit Images
  - ⊕ Notes for Imager
    - To get my demo test.imager.tiles.pl of Imager running, I had to do
    - sudo aptitude install libpng-dev
    - sudo aptitude install libfreetype6-dev
    - sudo aptitude install libfont-freetype-perl
    - Probably the 1st and 3rd only are required
  - Imager::File::GIF - Read and write GIF files
  - Imager::File::HEIF - Read and write HEIF files
  - Imager::File::JPEG - Read and write JPEG files
  - Imager::File::QOI - Read and write QOI image files
  - Imager::File::TIFF - Read and write TIFF files
  - Imager::File::WEBP - Read and write WEBP files
  - Imager::Font::FT2 - Font support using FreeType 2
  - Imager::QRCode - Generate QR Code with Imager using libqrencode
  - Matplotlib::Simple - Simple plotting
  - ⊕ Notes for Matplotlib::Simple
    - Note: POD is useless
  - PGPLOT - Allow subroutines in the PGPLOT graphics library to be called from Perl
  - PGPLOTx::Constants - Constants for use with PGPLOT
  - ⊕ Notes for PGPLOTx::Constants
    - See also Types::PGPLOT below
  - PGPLOT::Device - Autogenerate PGPLOT device names
  - Prima - A Perl graphic toolkit
  - Prima::Cairo - Prima extension for Cairo drawing
  - Math::Image::CalcResized - Calculate dimensions of image/video resized by ImageMagick-like geometry specification
  - Snig - (Simple|Static|Small|S..) Image Gallery
  - SVG - Perl extension for generating Scalable Vector Graphics (SVG) documents
  - SVG::Barcode - Base class for SVG 1D and 2D codes
  - SVG::Barcode::UPCA - Generator for SVG based UPCA barcodes
  - SVG::Timeline - Create SVG timeline charts
  - SVG::TrafficLight - Perl extension to produce SVG diagrams of traffic lights
  - Types::PGPLOT - Type::Tiny compatible types for the PGPLOT library
  - ⊕ Notes for Types::PGPLOT
    - See also PGPLOTx::Constants above
  - WebGPU::Direct - Direct access to the WebGPU native APIs
- ChemistryStuff
  - ⊕ See also
    - http://www.perlmol.org/
    - http://opensmiles.org/opensmiles.html
  - Chemistry::Domain - Class for domains in macromolecules
  - Chemistry::File - Molecule file I/O base class
  - Chemistry::File::InChI - InChI identifier reader
  - Chemistry::File::SMARTS - SMARTS chemical substructure pattern linear notation parser
  - Chemistry::File::SMILES - SMILES linear notation parser/writer
  - Chemistry::MacroMol - Perl module for macromolecules
  - Chemistry::Mol - Molecule object toolkit
  - ⊕ Notes for Chemistry::Mol
    - Contains Chemistry::Atom, Chemistry::Bond, Chemistry::Tutorial
  - Chemistry::OpenSMILES - OpenSMILES format reader and writer
  - Chemistry::Pattern - Chemical substructure pattern matching
  - Chemistry::Reaction - Explicit chemical reactions
  - Chemistry::Ring - Represent a ring as a substructure of a molecule
  - Chemistry::Tutorial - PerlMol Quick Tutorial
- ChildProcesses
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://metacpan.org/pod/perlipc#Bidirectional-Communication-with-Another-Process
  - Acme::Ghost - Yet another view to daemon processes
  - AnyEvent::Run - Run a process or coderef asynchronously
  - App::ProcUtils - Command line utilities related to processes
  - Child - Object oriented simple interface to fork()
  - CTK - CTK ToolKit library (CTKlib)
  - CTK::Daemon - Abstract class to implement Daemons
  - Daemon::Control - Create init scripts in Perl
  - Daemon::Daemonize - An easy-to-use daemon(izing) toolkit
  - Daemon::Device - Forking daemon device construct
  - Daemon::Generic - Framework to provide start/stop/reload for a daemon
  - HTTP::Daemon - A simple http server class
  - Forks::Super - Extensions and convenience methods to manage background processes
  - ⊕ Notes for Forks::Super
    - Provides new definitions for the Perl functions fork, wait, and waitpid with richer functionality
  - IO::Pipely - Portably create pipe() or pipe-like handles, one way or another
  - IPC::Cmd - Finding and running system commands made easy
  - ⊕ Notes for IPC::Cmd
    - system() and background procs w/ piping, redirs, ptys (Unix, Win32)
    - Can use IPC::Run
  - IPC::LockTicket - Use Storable library to IPC token to prevent parallel access to any resources. Including your custom data to transfer asynchronously
  - ⊕ Notes for IPC::LockTicket
    - But see Storable::Improved
  - IPC::MicroSocket - Minimal request/response or pub/sub mechanism
  - IPC::Open3 - Open a process for reading, writing, and error handling using open3()
  - IPC::Open3::Simple - A simple alternative to IPC::Open3
  - IPC::Run - system() and background procs w/ piping, redirs, ptys (Unix, Win32)
  - ⊕ Notes for IPC::Run
    - IPC::Run is a much more complete solution for running child processes (than the next)
  - IPC::Run3 - Run a subprocess with input/output redirection
  - ⊕ Notes for IPC::Run3
    - POD contains important comparison with various similar modules
  - IPC::Shareable - Use shared memory backed variables across processes
  - IPC::ShellCmd - Run a command with a given environment and capture output
  - MooseX::Daemonize - Role for daemonizing your Moose based application
  - Net::Daemon - Perl extension for portable daemons
  - Object::Remote - Call methods on objects in other processes or on other hosts
  - Proc::Application::Daemon - Daemon class based on Proc::Application
  - Proc::Background - Much simpler than the above
  - ⊕ Notes for Proc::Background
    - Supports Linux and MS Windows
    - Refers to the previous module
    - Refers to the Win32 module below
  - Proc::Daemon - Run Perl program(s) as a daemon process
  - Proc::Fork - Simple, intuitive interface to the fork() system call
  - Proc::Forking - Provides a set of tool to fork and daemonize
  - Proc::Forkmap - Map with forking
  - Proc::Govern - Run child process and govern its various aspects
  - Proc::PID::File - A module to manage process id files
  - Proc::ProcessTable - Perl extension to access the unix process table
  - Proc::ProcessTable::Colorizer - Like ps, but with colored columns and enhnaced functions for searching
  - Proc::Simple - Launch and control background processes
  - Proc::Spawn - Run external programs
  - Spawn::Safe - Fork and exec a process "safely"
  - Sys::Cmd - Run a system command or spawn a system processes
  - System::Command - Object for running system commands
  - Win32::Console::DotNet - Win32::Console .NET interface
  - Win32::IPC - Base class for Win32 synchronization objects
  - Win32::ShellQuote - Everyone quotes command line arguments the wrong way
  - Workflow::Inotify - Script to daemonize a Linux::Inotify2 handler
  - Zleep - Fork a new process, sleep for the number of ms and then execute the codeblock
- ClipBoard
  - App::ClipboardUtils - CLI utilities related to clipboard
  - Clipboard - Copy and paste with any OS
  - ⊕ Notes for Clipboard
    - It includes 5 command line utilities for clipboard manipulation
  - Clipboard::Any - Common interface to clipboard manager functions
- CodingStyle
  - ⊕ See also
    - [Topic]
    - https://en.wikipedia.org/wiki/Eshu
  - App::CriticDB - Manage a database of Perl::Critic violations
  - Code::TidyAll - Engine for tidyall, your all-in-one code tidier and validator
  - Eshu - Indentation fixer for C, Perl, XS, XML, HTML, CSS, JavaScript and POD source files
  - Guacamole - Enforce Standard Perl syntax with Guacamole
  - mb - Can easy script in Big5, Big5-HKSCS, GBK, Sjis(also CP932), UHC, UTF-8, ...
  - Perl::Critic - Critique Perl source code for best-practices
  - Perl::Critic::Community - Community-inspired Perl::Critic policies
  - Perl::Critic::Grape - Additional Perl::Critic policies
  - Perl::Critic::PJCJ - Perl::Critic policies for code style consistency
  - Perl::Critic::PolicyBundle::SNEZ - Extra Perl::Critic policies
  - Perl::Critic::Policy::Community::DiscouragedModules - Various modules discouraged from use
  - Perl::Critic::Policy::Community::PreferredAlternatives - Various modules with preferred alternatives
  - Perl::Critic::Policy::ControlStructures::LoopsRequireLabels - Require labels on loops and their break keywords
  - Perl::Critic::Policy::ControlStructures::ProhibitBareBlockLoopControls - Prohibit unlabeled loop controls in non-loop blocks
  - Perl::Critic::Policy::ControlStructures::ProhibitReturnInDoBlock - Do not "return" in "do" block
  - Perl::Critic::Policy::ControlStructures::ProhibitReturnInMappingBlock - Do not "return" in mapping blocks (map, grep, sort)
  - Perl::Critic::Policy::Misc::ProhibitMethodsInStringConcat - Prohibit method calls in string concatenation
  - Perl::Critic::Policy::RegularExpressions::ProhibitEmptyAlternatives - Beware empty alternatives, because they always match
  - Perl::Critic::Policy::Security::RandBytesFromHash - Flag common anti-patterns for generating random bytes
  - Perl::Critic::Policy::ValuesAndExpressions::ProhibitFiletest_rwxRWX - Prohibit file access tests
  - Perl::Critic::Policy::Variables::ProhibitLoopOnHash - Don't write loops on hashes, only on keys and values of hashes
  - Perl::Critic::Policy::Variables::ProhibitNumericNamesWithLeadingZero - Don't use numeric variable names with leading zeros
  - Perl::Critic::Policy::Variables::ProhibitUnusedVariables - Don't ask for storage you don't need
  - Perl::Critic::Policy::Variables::ProhibitUnusedVarsStricter - Don't ask for storage you don't need
  - Perl::Critic::Pulp - Some add-on perlcritic policies
  - ⊕ Notes for Perl::Critic::Pulp
    - Contains Types::Standard
    - See DataTypes
  - Perl::Critic::StricterSubs - Perl::Critic plugin for stricter subroutine checks
  - Perl::Tidy - Parses and beautifies perl source
- Color
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/ANSI_escape_code
    - https://en.wikipedia.org/wiki/X11_color_names
    - https://imagemagick.org/script/color.php
    - For env var NO_COLOR
    - Pantone Colors
    - https://www.w3.org/TR/css-color-3/
  - Acme::AutoColor - Automatic color names
  - ANSI::Palette - ANSI Color palettes
  - App::ANSIColorUtils - Utilities related to ANSI color
  - Colors - ImageMagick Color Names
  - Color::ANSI::Util - Routines for dealing with ANSI colors
  - Color::Library - An easy-to-use and comprehensive named-color library
  - Color::Rgb - Simple rgb.txt parsing class
  - Color::RGB::Util - Utilities related to RGB colors
  - Color::Spectrum - Just another HTML color generator
  - Colouring::In - Color or colour
  - Colouring::In::XS - Color or colour
  - Data::Displaycolour - Work with display colours
  - Graphics::ColorNames - Defines RGB values for common color names
  - Graphics::ColorNames::CSS - CSS color names and equivalent RGB values
  - Graphics::ColorNames::GrayScale - RGB values of shades of gray and base colors
  - Graphics::ColorNames::HTML - HTML color names and equivalent RGB values
  - Graphics::ColorNames::Mozilla - Mozilla, Netscape 6.0, Galeon (anything using Gecko) color names and equivalent RGB values
  - Graphics::ColorNames::Pantone - RGB values of Pantone colors
  - Graphics::ColorNames::SVG - SVG color names and equivalent RGB values
  - Graphics::ColorNames::WWW - WWW color names and equivalent RGB values
  - Graphics::ColorNamesLite::All - Lots of color names and equivalent RGB values (lite version)
  - ⊕ Notes for Graphics::ColorNamesLite::All
    - There is also Graphics::ColorNamesLite::All
    - https://metacpan.org/dist/Graphics-ColorNamesLite-EN
  - Graphics::ColorObject - Convert between color spaces
  - ⊕ Notes for Graphics::ColorObject
    - Part of https://metacpan.org/dist/Term-ANSIColor-Concise
  - Graphics::Colourset - Create sets of colours
  - Graphics::ColorUtils - Easy-to-use color space conversions and more
  - Graphics::Toolkit::Color - Color palette creation helper
  - Term::ANSI::Sprintf - Sprintf with ANSI colors
  - Term::ANSIColor - Color screen output using ANSI escape sequences. Built-in
  - ⊕ Notes for Term::ANSIColor
    - It only acts on the terminal formatting escape sequences that end in 'm' and leaves all other ones alone
  - Term::ANSIColor::Concise - Produce ANSI terminal sequence by concise notation
  - ⊕ Notes for Term::ANSIColor::Concise
    - Contains Graphics::ColorObject
  - Term::ANSIColor::Gradients - Curated ANSI 256-color palette library
  - Term::Chrome - DSL for colors and other terminal chrome
  - Term::ExtendedColor - Color screen output using 256 colors
- CommandLineStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/ANSI_escape_code
    - https://en.wikipedia.org/wiki/X11_color_names
    - For unibilium, a terminfo parsing library
    - For env var NO_COLOR
    - For Turso DB
  - Aion::Emitter - Event dispatcher
  - Aion::Env - Creates a constant associated with the value from .env
  - Aion::Run - Role for console commands
  - Alien::libtickit - Alien wrapping for libtickit
  - ⊕ Notes for Alien::libtickit
    - This module behaves like ExtUtils::PkgConfig
  - Alien::Turso::CLI - Install and find Turso CLI
  - App::ansicolumn - ANSI sequence aware column command
  - App::ansifold - Fold command handling ANSI terminal sequences
  - App::BashHistoryUtils - CLI utilities related to bash history file
  - App::CaseUtils - CLI utilities related to case (uppercase/lowercase)
  - App::ChangeShebang - Change shebang lines for relocatable perl
  - App::Cmd - Write command line apps with less suffering
  - App::cat::v - cat-v command implementation
  - App::chot - Command Heuristic Omni-Tracer
  - ⊕ Notes for App::chot
    - But see App::PMUtils
  - App::lms - A utility to locate and display command or library files
  - ⊕ Notes for App::lms
    - But see App::PMUtils
  - App::nup - N-up output wrapper for optex -Mup
  - App::oo_modulino_zsh_completion_helper - Provides zsh completion for OO-Modulinos
  - App::optex - General purpose command option wrapper
  - App::optex::up - Optex module for multi-column paged output
  - App::optex::rpn - Optex module for Reverse Polish Notation calculation
  - App::optex::xform - Data transform filter module for optex
  - App::papersway - PaperWM-like scrollable tiling window management for Sway/i3wm
  - ⊕ Notes for App::papersway
    - https://github.com/paperwm/paperwm
  - App::PickArgs - Pick one or more items from command-line arguments
  - App::PMUtils - Command-line utilities related to Perl modules
  - App::ptimeout - Module implementing ptimeout
  - App::SpeedTest - Command-line interface to speedtest.net
  - Argv - The special filehandle that iterates over command-line filenames in @ARGV
  - ARGV::OrDATA - Let the diamond operator read from DATA if there's no ARGV
  - B::cstring - Returns a double-quote-surrounded escaped version of STR which can be used as a string in C source code
  - B::perlstring - Returns a double-quote-surrounded escaped version of STR which can be used as a string in Perl source code
  - BATsh - Bilingual Shell: cmd.exe and bash in one script (self-contained)
  - Chandra - Perl bindings to webview-c for creating cross-platform GUIs
  - Check::Term - Check terminal functionality
  - Check::Term::Color - Check terminal color functionality
  - CLI::Cmdline - Minimal command-line parser with short/long options and aliases in pure Perl
  - CLI::Framework - Build standardized, flexible, testable command-line applications
  - CLI::Helpers - Subroutines for making simple command line scripts
  - CLI::Simple - A minimalist object oriented base class for CLI applications
  - Command::Run - Execute external command or code reference
  - Command::Runner - Run external commands and Perl code refs
  - cpanm-shcompgen - Install modules from CPAN (and activate shell completion)
  - ⊕ Notes for cpanm-shcompgen
    - See shcompgen below
  - Curses - Terminal screen handling and optimization
  - Curses::UI - A curses based OO user interface framework
  - Curses::UI::POE - A subclass makes Curses::UI POE Friendly
  - Expect - Automate interactions with command line programs that expose a text terminal interface
  - Getopt::App - Write and test your script with ease
  - ⊕ Notes for Getopt::App
    - Helps you structure your scripts and integrates Getopt::Long with a very simple API
    - Makes it very easy to test your script, since the script file can be sourced without actually being run
  - Getopt::ArgvFile - Interpolates script options from files into @ARGV or another array
  - Getopt::Class - Extended dictionary version of Getopt::Long
  - ⊕ Notes for Getopt::Class
    - Fancy!
  - Getopt::EX - Getopt Extender
  - Getopt::EX::Colormap - ANSI terminal color and option support
  - Getopt::EX::Config - Getopt::EX module configuration interface
  - Getopt::EX::Hashed - Hash object automation for Getopt::Long
  - Getopt::EX::i18n - General i18n module
  - Getopt::EX::LabeledParam - Labeled parameter handling
  - Getopt::EX::termcolor - Getopt::EX termcolor module
  - Getopt::Guided - getopts implementation that follows POSIX utility guidelines
  - Getopt::Lazier - Lazy Getopt-like command-line options and argument parser
  - Getopt::Long - Extended processing of command line options
  - Getopt::Long::Bash - Bash option parsing that does what you mean
  - Getopt::Long::More - Like Getopt::Long, but with more stuffs
  - Getopt::Std - Process single-character switches with switch clustering. Built-in
  - Getopt::Type::Tiny - Clean Getopt::Long wrapper with Type::Tiny support
  - Getopt::Yath - Option processing yath style
  - IO::Termios - Supply termios(3) methods to IO::Handle objects
  - MooX::Cmd - Giving an easy Moo style way to make command organized CLI apps
  - MooX::Options - Explicit Options eXtension for Object Class
  - OptArgs2 - Command-line argument and option processor
  - PerlVision - Text-mode User Interface Widgets
  - Progress::Any - Record progress to any output
  - Progress::Any::Output::TermProgressBarColor - Output progress to terminal as color bar
  - Progress::Any::SIGHandler - Output progress to terminal as simple message
  - Ragnetto::Console - ANSI terminal control utility
  - Reply - Read, eval, print, loop, yay!
  - Rope::Cmd - Command Line Applications via Rope
  - shcompgen - Generate shell completion scripts
  - ⊕ Notes for shcompgen
    - See cpanm-shcompgen above
  - Shell::Cmd - Run shell commands with enhanced support
  - Shell::Perl - A read-eval-print loop in Perl
  - ⊕ Notes for Shell::Perl
    - See also Devel::REPL
  - String::ShellQuote - Quote strings for passing through the shell
  - Term::Choose - Choose items from a list interactively.
  - Term::Choose::LineFold - Control the number of occupied columns of a character string on a terminal with a monospaced font
  - Term::Choose::LineFold::XS - XS acceleration for Term-Choose-LineFold
  - Term::Choose::Util - TUI-related functions for selecting directories, files, numbers and subsets of lists.
  - Term::Encoding - Detect encoding of the current terminal
  - Term::Form - Read lines from STDIN
  - Term::CLI - CLI interpreter based on Term::ReadLine
  - Term::Terminfo - Access the terminfo database
  - Term::ProgressSpinner - Terminal Progress bars!
  - Term::ReadKey - A perl module for simple terminal control
  - ⊕ Notes for Term::ReadKey
    - Contains GetTerminalSize
  - Term::ReadLine - Perl interface to various readline packages. If no real package is found, substitutes stubs instead of basic functions
  - Term::ReadLine::Gnu - Perl extension for the GNU Readline/History Library
  - Term::ReadLine::Repl - A batteries included interactive Term::ReadLine REPL module
  - Term::UI - Term::ReadLine UI made easy
  - Tickit - Terminal Interface Construction KIT
  - TUI::Vision - Perl TUI Framework (Turbo Vision 2.0 Port)
  - ⊕ Notes for TUI::Vision
    - TUI::Vision is the successor namespace to the TV:: (TVision?) module family
  - TVision - Perl glue to the TurboVision library
  - ⊕ Notes for TVision
    - A modern port of Turbo Vision 2.0, the classical framework for text-based user interfaces. Now cross-platform and with Unicode support
  - Util::CommandLine - Command-line interface helper utility
- ConfigFiles
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://editorconfig.org/
    - For .Desktop files
  - Advanced::Config - Perl module reads configuation files from various sources
  - ⊕ Notes for Advanced::Config
    - Advanced::Config is an enhanced implementation of a config file manager that allows you to manage almost any config file as a true object with a common interface
  - App::Cme - Configuration data checker or editor based on Config::Model
  - ⊕ Notes for App::Cme
    - Contains the cms command
  - App::Env - Manage application specific environments
  - App::Options - Combine command line options, environment vars, and option file values (for program configuration). Also discusses a range of other config-type modules
  - AppConfig - Perl5 module for reading configuration files and parsing command line arguments
  - Clearcase - Object oriented interface to Clearcase
  - ⊕ Notes for Clearcase
    - IBM DevOps Code ClearCase (also known as IBM Rational ClearCase) supports software configuration management (SCM)
  - Colon::Config - XS helper to read a configuration file using ':' as separator
  - Conf::Libconfig - Perl extension for libconfig
  - Config::Abstraction - Configuration Abstraction Layer
  - Config::Any - Load configuration from different file formats, transparently
  - Config::App - Cascading merged application configuration
  - Config::Auto - Magical config file parser
  - Config::Dot - Module for simple configure file parsing
  - Config::General - Generic Config Module
  - ⊕ Notes for Config::General
    - Has many features
  - Config::IniFiles - A module for reading .ini-style configuration files
  - Config::INI::Reader - A subclassable .ini-file parser
  - Config::INI::Reader::Multiline - Parser for .ini files with line continuations
  - Config::INI::RefVars - INI file reader, allows the referencing of INI and environment variables within the INI file
  - Config::INI::Tiny - Parse INI configuration in extremely little code
  - Config::IOD - Read and write IOD/INI configuration files
  - ⊕ Notes for Config::IOD
    - This module is a round-trip parser for IOD configuration format
    - If you only need to read IOD configuration files, you might want to use Config::IOD::Reader instead
    - See IOD below
  - Config::IOD::Reader - Read IOD/INI configuration files
  - ⊕ Notes for Config::IOD::Reader
    - It is a minimalist alternative to the more fully-featured Config::IOD
    - See IOD below
  - Config::Model - A framework to validate, migrate and edit configuration files
  - ⊕ Notes for Config::Model
    - I hope you never need code this complex
    - See also Config::Model::Tester
  - Config::Model::CursesUI - Curses interface to edit config data
  - Config::Model::Itself - Model (or schema) editor for Config::Model
  - Config::Model::LcdProc - Edit and validate LcdProc configuration file
  - ⊕ Notes for Config::Model::LcdProc
    - http://lcdproc.omnipotent.net/
  - Config::Model::OpenSsh - A graphical config editor for /etc/ssh/sshd_config, /etc/ssh/ssh_config and ~/.ssh/config
  - Config::Model::Systemd - Editor and validator for systemd configuration files
  - Config::Model::TkUI - Tk GUI to edit config data through Config::Model
  - Config::MorePerl - Convenient and flexible config loader in perl format
  - Config::Neat - Parse/render human-readable configuration files with inheritance and schema validation
  - Config::NINI - Parse NINI files
  - Config::Param - All you want to do with parameters for your program (or someone else's)
  - ⊕ Notes for Config::Param
    - Also discusses a range of other config-type modules
  - Config::Parser - Base class for configuration file parsers
  - Config::Resolver - Recursively resolve placeholders in a data structure
  - Config::ROFL - Yet another config module. Uses Config::ZOMG
  - Config::Simple - Simple configuration file class
  - Config::Simple::Conf - A fast and lightweight configuration file handler
  - Config::Structured - Provides generalized and structured configuration value access
  - Config::Tiny - Read/Write .ini style files with as little code as possible
  - Config::Tiny::Ordered - Read/Write ordered .ini style files with as little code as possible
  - Config::Writer - A module to write configuration files in an easy and safe way
  - Config::ZOMG - Yet another layer over Config::Any
  - ConfigReader::Simple - A simple line-oriented configuration file parser
  - Env::Assert - Ensure that the environment variables match what you need, or abort
  - Env::AsYaml - Is intended to be a tool for examination of the environment
  - Env::Dot - Read environment variables from a .env file
  - ENV::Util - Parse prefixed environment variables and dotenv (.env) files into Perl
  - File::DesktopEntry - Object to handle .desktop files
  - IOD - IOD (INI On Drugs) file format specification
  - ⊕ Notes for IOD
    - See Config::IOD and Config::IOD::Reader above
  - Parse::PlainConfig - Provides hierarchical config file structures
  - Perinci::CmdLine::Util::Config - Utility routines related to config files
  - TOML - Tom's Obvious, Minimal Language is a file format for configuration files
  - ⊕ Notes for TOML
    - Supports the following data types: string, integer, float, boolean, datetime, array, and table
  - TOML::Tiny - A minimal, pure perl TOML parser and serializer
  - TOML::XS - Turbo-charged TOML parsing!
- ConstantStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Common::CodingTools - Common constants and functions for programmers
  - Const::Exporter - Declare constants for export
  - Const::Fast - Facility for creating read-only scalars, arrays, and hashes
  - ⊕ Notes for Const::Fast
    - But see Const::XS for speed tests
  - Const::Fast::Exporter -
  - Const::XS - Facility for creating read-only scalars, arrays, hashes
  - Constant::Export::Lazy - This module only allows you to declare function symbol constants, akin to the constant module by defining functions that are only called as needed. The interface is rather complex
  - Constant::Exporter - This module only allows you to declare function symbol constants, akin to the constant module, although you can specify tags
  - constant::string - Perl pragma to declare constants whose values are their own names
  - Exporter::Constants - This module only allows you to declare function symbol constants, akin to the constant module, without tags
  - MooseX::SetOnce - Write-once, read-many attributes for Moose
  - MooseX::Types::Ro - Moose type constraints for read-only containers
  - MooX::Const - Syntactic sugar for constant and write-once Moo(se) attributes
  - Readonly - Facility for creating read-only scalars, arrays, hashes
  - ⊕ Notes for Readonly
    - But see Const::XS for speed tests
  - Readonly::Tiny - Simple, correct readonly values
  - Readonly::Values::Boolean - Boolean Constants
  - Readonly::Values::Days - Days Constants
  - Readonly::Values::Months - Months Constants
  - Sub::Trigger::Lock - A coderef for use in Moose triggers that will lock hashrefs and arrayrefs
  - Types::Const - Types that coerce references to read-only
  - Types::ReadOnly - Type constraints and coercions for read-only data structures and locked hashes
- CPAN
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For the CPAN Testers wiki
    - For Docker
    - For Docker Compose
    - https://fastapi.metacpan.org
    - https://github.com/metacpan/metacpan-api
    - https://github.com/metacpan/metacpan-docker
    - https://github.com/metacpan/metacpan-web
    - https://keepachangelog.com/
    - https://metacpan.org
    - https://perlmaven.com/pinto-tutorial
    - https://pinguinorodriguez.cl/blog/bundling-vendored-modules/
  - App::CPAN::Dependents - Recursively find all reverse dependencies for a distribution or module
  - App::CPAN::Get - Tool to fetch module from CPAN archive
  - App::CPAN::Mini::Visit - Explore each distribution in a minicpan repository
  - App::CPAN::Search - Base class for cpan-search script
  - App::CpanDak - Cpanm, with some sort of distroprefs
  - App::cpangitify - Convert cpan distribution from BackPAN to a git repository
  - ⊕ Notes for App::cpangitify
    - See also Git::CPAN::Patch
  - App::CPANIDX - Queryable web-based CPAN Index
  - Acme::CPANAuthors - We are CPAN authors
  - Acme::CPANAuthors::InMemoriam - Remembering our fallen heroes
  - Acme::CPANAuthors::Not - We are not CPAN authors
  - App::cpm - A fast CPAN module installer
  - App::cpx - Install and execute CPAN package binaries
  - App::lcpan - Manage your local CPAN mirror
  - App::makefilepl2cpanfile - Convert Makefile.PL to a cpanfile automatically
  - App::MechaCPAN - Mechanize the installation of CPAN things
  - App::pause - A CLI for PAUSE
  - App::PAUSE::CheckPerms - Check if PAUSE permissions are consistent for all modules in a dist
  - App::PAUSE::Comaint - Make someone co-maint of your module on PAUSE/CPAN
  - App::sourcepan - Modulino implementation of soucepan
  - ⊕ Notes for App::sourcepan
    - Contains sourcepan, to fetch source archives from CPAN
  - Changes - Changes file management
  - ⊕ Notes for Changes
    - Subclasses: Changes::Change, Changes::Group, Changes::NewLine, Changes::Release, Changes::Version
  - CPAN - Query, download and build perl modules from CPAN sites
  - CPAN::Audit - Audit CPAN distributions for known vulnerabilities
  - CPAN::Audit::DB - The CPAN Security Advisory data as a Perl data structure, mostly for CPAN::Audit
  - CPAN::Changes - Parser for CPAN style change logs
  - ⊕ Notes for CPAN::Changes
    - Contains CPAN::Changes::Spec
  - CPAN::Changes::Parser - Parse a CPAN Changelog file
  - CPAN::Changes::Parser::KeepAChangeLog - Parser for Keep a Changelog formatted files
  - CPAN::Common::Index - Common library for searching CPAN modules, authors and distributions
  - CPAN::DistnameInfo - Extract distribution name and version from a distribution filename
  - CPAN::Distroprefs - Read and match distroprefs
  - CPAN::Faker - Build a bogus CPAN instance for testing
  - CPAN::FindDependencies - Find dependencies for modules on the CPAN
  - CPAN::Index::File::Whois - Interface to 00whois.xml
  - CPAN::IndexPod - Index the POD from an unpacked CPAN
  - CPAN::Info::FromURL - Extract/guess information from a URL
  - ⊕ Notes for CPAN::Info::FromURL
    - Contains CPAN::Author::FromURL, CPAN::Dist::FromURL, CPAN::Module::FromURL, CPAN::Release::FromURL
  - CPAN::InGit - Manage custom CPAN trees to pin versions for your projects
  - CPAN::Maker - Create a CPAN distribution
  - CPAN::Maker::Bootstrapper - Scaffold a new CPAN distribution in one command
  - ⊕ Notes for CPAN::Maker::Bootstrapper
    - Contains CPAN::Maker::ConfigReader etc
  - CPAN::Meta::X - Catalog of custom (x_*) keys in CPAN distribution metadata being used in the wild
  - CPAN::MetaCurator - Manage the cpan.metacurator.sqlite database
  - CPAN::MetaPackager - Manage the cpan.metapackager.sqlite database
  - CPAN::Mini - Create a minimal mirror of CPAN
  - CPAN::Mini::FromList - Create a minimal CPAN mirror from a list of modules you specify
  - CPAN::Mini::Inject - Inject modules into a CPAN::Mini mirror.
  - CPAN::Mirror::Tiny - Create partial CPAN mirror (a.k.a. DarkPAN
  - CPAN::Nearest - Find the nearest module to a given name
  - CPAN::PackageDetails - Create or read 02packages.details.txt.gz
  - CPAN::ParseDistribution - Index a file from the BackPAN
  - CPAN::Perl::Releases - Mapping Perl releases on CPAN to the location of the tarballs
  - CPAN::Perl::Releases::MetaCPAN - Mapping Perl releases on CPAN to the location of the tarballs via MetaCPAN API
  - CPAN::Plugin::Sysdeps - A CPAN.pm plugin for installing system dependencies
  - CPAN::Reporter - Adds CPAN Testers reporting to CPAN.pm
  - CPAN::Repository - API to access a directory which can be served as CPAN repository
  - CPAN::Repository::Packages - Parse 02packages
  - CPAN::Repository::Perms - Parse 06perms
  - ⊕ Notes for CPAN::Repository::Perms
    - See Parse::CPAN::Perms below
  - CPAN::Requirements::Dynamic - Dynamic prerequisites in meta files
  - CPAN::RPM - A Perl module packager
  - CPAN::Search::Lite - Setup and maintain a searchable CPAN database
  - CPAN::Search::Tester - Interface to search CPAN module tester
  - CPAN::Source - CPAN source list data aggregator
  - CPAN::SQLite - Maintain and search a minimal CPAN database
  - CPAN::Tarball::Patch - Patch a CPAN tarball, via CPAN::Distroprefs mechanism
  - CPAN::Testers::Schema - Schema for CPANTesters database processed from test reports
  - CPAN::Testers::ParseReport - Parse reports to www.cpantesters.org from various sources
  - CPAN::UnsupportedFinder - Identify unsupported or poorly maintained CPAN modules
  - CPAN::Uploader - Upload things to the CPAN
  - CPAN::02Packages::Search - Search packages in 02packages.details.txt
  - CPANPLUS - API & CLI access to the CPAN mirrors
  - ⊕ Notes for CPANPLUS
    - Has many sub-modules
  - CPANPLUS::Backend - Programmer's interface to CPANPLUS
  - CPANPLUS::Config - Configuration defaults and heuristics for CPANPLUS
  - CPANPLUS::Configure - Configuration for CPANPLUS
  - CPANPLUS::Dist::Debora - Create Debian or RPM packages from Perl modules
  - CPANPLUS::Module - CPAN module objects for CPANPLUS
  - CPANSA::DB - The CPAN Security Advisory data as a Perl data structure, mostly for CPAN::Audit
  - DarkPAN::Utils - A set of utilities for working with a DarkPAN
  - Git::CPAN::Patch - Patch CPAN modules using Git
  - ⊕ Notes for Git::CPAN::Patch
    - See also App::cpangitify
  - Menlo - A CPAN client
  - MetaCPAN - Running the MetaCPAN stack with Docker
  - MetaCPAN::API - A comprehensive, DWIM-featured API to MetaCPAN - Deprecated
  - ⊕ Notes for MetaCPAN::API
    - See MetaCPAN::Client
  - MetaCPAN::Client - A comprehensive, DWIM-featured client to the MetaCPAN API
  - MetaCPAN::Pod::HTML - Format Pod as HTML for MetaCPAN
  - MetaCPAN::Role - A collection of roles useful to MetaCPAN project
  - Module::Metadata - Gather package and POD information from perl module file
  - Module::Metadata::Changes - Manage machine-readable Changes/CHANGES/Changelog.ini files
  - ⊕ Notes for Module::Metadata::Changes
    - Contains Ron's simple home-grown change file manager called ini.report.pl
  - Net::API::CPAN - A client to issue queries to the MetaCPAN REST API
  - OrePAN2 - Yet another DarkPAN manager
  - OrePAN2::S3 - This script is used to add distributions to your own DarkPAN repository housed on Amazon's S3 storage
  - OrePAN2::Server - DarkPAN Server
  - Package::DeprecationManager - Manage deprecation warnings for your distribution
  - Parse::CPAN::Authors - Parse 01mailrc.txt.gz
  - Parse::CPAN::Meta - Parse META.yml and META.json CPAN metadata files
  - Parse::CPAN::Packages - Parse 02packages.details.txt.gz
  - ⊕ Notes for Parse::CPAN::Packages
    - But see https://metacpan.org/pod/Parse::CPAN::Packages
  - Parse::CPAN::Perms - Parse 06perms.txt.gz
  - ⊕ Notes for Parse::CPAN::Perms
    - See CPAN::Repository::Perms above
  - Parse::CPAN::Packages::Fast - Parse CPAN's package index
  - Parse::CPAN::Whois - Parse CPAN's authors/00whois.xml file
  - Parse::Distname - Parse a distribution name
  - PAUSE::Packages - Interface to PAUSE's packages file (02packages.details.txt)
  - PAUSE::Permissions - Interface to PAUSE's module permissions file (06perms.txt)
  - PAUSE::Users - Interface to PAUSE's users file (00whois.xml)
  - Release::Checklist - A QA checklist for CPAN releases
  - WorePAN - Creates a partial CPAN mirror for tests
- CpanFile
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - CPAN::Audit - Audit CPAN distributions for known vulnerabilities
  - ⊕ Notes for CPAN::Audit
    - This module contains cpan-audit, which uses a cpanfile or a cpanfile.snapshot file
- cron
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - BPM::Engine - Business Process Execution Engine
  - BPM::XPDL - XPDL access
  - Chronic - A constraints-based, opportunistic, application-level scheduler
  - Cron::Toolkit - Quartz-compatible cron parser with unique extensions and over 400 tests
  - Schedule::Activity - Generate random activity schedules
  - Schedule::Cron - cron-like scheduler for Perl subroutines. Use it to create a daemon
  - Schedule::Easing - Scheduled ramp-up and linear activation of events
  - Schedule::LongSteps - Manage long term processes over arbitrary large spans of time
- CryptoStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Mojolicious::Plugin::Credentials
    - [Topic]
    - [Topic]
    - https://blogs.perl.org/users/leon_timmermans/2024/02/using-peppers-with-cryptpassphrase.html
    - For choosing a PRNG
    - https://en.wikipedia.org/wiki/EdDSA#Ed25519
    - http://en.wikipedia.org/wiki/PBKDF2
    - https://en.wikipedia.org/wiki/RSA_cryptosystem
    - For PRNG testing
    - https://letsencrypt.org/
    - https://openquantumsafe.org/
    - https://security.metacpan.org/docs/guides/random-data-for-security.html
    - https://www.nntp.perl.org/group/perl.perl5.porters/2024/11/msg269033.html
    - For libcrypto
    - For an overview of the PCG family
    - https://www.vaultproject.io/
    - For choosing a PRNG
  - Alien::libsecp256k1 - Perl builder for libsecp256k1
  - Alt::Digest::MD5::OpenSSL - Alternative Digest::MD5 based on OpenSSL
  - App::bcrypt - A command-line tool to deal with bcrypt password hashing
  - App::Bitcoin::PaperWallet - Generate printable cold storage of bitcoins
  - App::xsum - Compute and check file checksums/digests (using various algorithms)
  - Authen::Passphrase - Hashed passwords/passphrases as objects
  - Authen::Passphrase::Argon2 - Store and check password using Argon2
  - ⊕ Notes for Authen::Passphrase::Argon2
    - This is an attempt to make Crypt::Argon2 compliant with Authen::Passphrase
  - Bitcoin::Crypto - Bitcoin cryptography in Perl
  - Bitcoin::Secp256k1 - Perl interface to libsecp256k1
  - Bytes::Random::Secure - Perl extension to generate cryptographically-secure random bytes
  - Bytes::Random::Secure::Tiny - A tiny Perl extension to generate cryptographically-secure random bytes
  - Circle::Chain - The Circle::Chain SDks
  - ⊕ Notes for Circle::Chain
    - See also Circle::User, Circle::Wallet, Circle::Block, Circle::Node modules
  - Circle::Miner - The miner module for circle chain sdk.
  - Crypt::Age - Perl implementation of age encryption (age-encryption.org)
  - Crypt::Argon2 - Perl interface to the Argon2 key derivation functions
  - Crypt::Bear - BearSSL for Perl
  - Crypt::CBC - Encrypt Data with Cipher Block Chaining Mode
  - Crypt::Credentials - Manage credential files
  - Crypt::Curve25519 - Generate shared secret using elliptic-curve Diffie-Hellman function
  - Crypt::DES - Perl DES encryption module
  - ⊕ Notes for Crypt::DES
    - Warning: Do note that DES only uses 8 byte keys and only works on 8 byte data blocks.
    - If you're intending to encrypt larger blocks or entire files, please use Crypt::CBC in conjunction with this module
  - Crypt::DES_EDE3 - Triple-DES EDE encryption/decryption
  - ⊕ Notes for Crypt::DES_EDE3
    - This is a wrapper around Crypt::DES
  - Crypt::Diceware - Random passphrase generator loosely based on the Diceware algorithm
  - Crypt::DSA - DSA Signatures and Key Generation - Deprecated
  - ⊕ Notes for Crypt::DSA
    - Crypt::DSA is an implementation of the DSA (Digital Signature Algorithm) signature verification system
    - The heavy-duty mathematics underneath are provided by the Math::Pari library
    - DSA (Digital Signature Algorithm) signatures are no longer considered to be adequate for security
    - Possible replacement is Crypt::DSA::GMP
  - Crypt::DSA::GMP - DSA Signatures and Key Generation
  - Crypt::Fernet - Perl extension for Fernet (symmetric encryption)
  - Crypt::HSM - A PKCS11 interface for Perl
  - Crypt::JWT - JSON Web Token (JWT, JWS, JWE) as defined by RFC7519, RFC7515, RFC7516
  - Crypt::Komihash - Komihash implementation in Perl
  - Crypt::LE - Let's Encrypt (and other ACME-based) API interfacing module and client.
  - ⊕ Notes for Crypt::LE
    - See also Net::ACME2
  - Crypt::Liboqs::Sign - Post-Quantum Digital Signatures via liboqs
  - ⊕ Notes for Crypt::Liboqs::Sign
    - This module is a drop-in replacement for Crypt::PQClean::Sign
  - Crypt::MatrixSSL3 - Perl extension for SSL and TLS using MatrixSSL.org v3.9.3
  - Crypt::Misc - Miscellaneous functions related to (or used by) CryptX
  - Crypt::NaCl::Sodium - NaCl compatible modern, easy-to-use library for encryption, decryption, signatures, password hashing and more
  - Crypt::NaCl::Tweet - XS bindings for TweetNaCl
  - Crypt::OpenPGP - Pure-Perl OpenPGP implementation
  - Crypt::OpenSSL::AES - https://metacpan.org/pod/Crypt::OpenSSL::AES
  - ⊕ Notes for Crypt::OpenSSL::AES
    - See also Crypt::CBC
  - Crypt::OpenSSL::BaseFunc - Base Functions, using the OpenSSL libraries
  - Crypt::OpenSSL::Bignum - OpenSSL's multiprecision integer arithmetic
  - Crypt::OpenSSL::EC - Perl extension for OpenSSL EC (Elliptic Curves) library
  - Crypt::OpenSSL::Guess - Guess OpenSSL include path
  - Crypt::OpenSSL::PBKDF2 - Wrapper for PBKDF2 keys derivation function of the OpenSSL library
  - Crypt::OpenSSL::PKCS10 - Perl extension to OpenSSL's PKCS10 API
  - Crypt::OpenSSL::PKCS12 - Perl extension to OpenSSL's PKCS12 API
  - Crypt::OpenSSL::Random - OpenSSL/LibreSSL pseudo-random number generator access
  - Crypt::OpenSSL::RSA - RSA encoding and decoding, using the openSSL libraries
  - ⊕ Notes for Crypt::OpenSSL::RSA
    - Prefer Crypt::PK::RSA. See Net::SAML2
  - Crypt::OpenSSL::SignCSR - Sign a Certificate Signing Request in XS
  - Crypt::OpenSSL::X509 - Perl extension to OpenSSL's X509 API
  - Crypt::OpenSSL3 - A modern OpenSSL wrapper
  - Crypt::OpenToken - Perl implementation of Ping Identity's "OpenToken"
  - Crypt::Passphrase - A module for managing passwords in a crypto-graphically agile manner
  - ⊕ Notes for Crypt::Passphrase
    - Contains Crypt::Passphrase::Pepper::Simple
    - But see Crypt::Passphrase::Bcrypt::AES
  - Crypt::Passphrase::Argon2 - An Argon2 encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::Argon2
    - It is the recommended password encoder as of 2023
  - Crypt::Passphrase::Argon2::HSM - HSM encrypted Argon2 hashes for Crypt::Passphrase
  - Crypt::Passphrase::Bcrypt::AES - A peppered AES-encrypted Bcrypt encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::Bcrypt::AES
    - But see Crypt::Passphrase::Bcrypt::AES
  - Crypt::Passphrase::HSM - A hasher using hardware for Crypt::Passphrase
  - Crypt::Passphrase::Linux - An Linux crypt encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::Linux
    - Recommended if you need to be compatible with standard Linux system passwords
  - Crypt::Passphrase::PBKDF2 - A PBKDF2 encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::PBKDF2
    - Only recommended when FIPS-compliance is required
    - This is the only portable pure-perl backend
  - Crypt::Passphrase::SaltedHash - Validate against Crypt::SaltedHash hashes with Crypt::Passphrase
  - Crypt::Passphrase::Scrypt - A scrypt encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::Scrypt
    - If one wants a memory-hard password scheme Argon2 or Yescrypt is recommended instead
  - Crypt::Passphrase::System - An system crypt() encoder for Crypt::Passphrase
  - ⊕ Notes for Crypt::Passphrase::System
    - Note that the supported algorithms depend entirely on your platform
  - Crypt::Passphrase::Yescrypt - A yescrypt encoder for Crypt::Passphrase
  - Crypt::PasswdMD5 - Provide interoperable MD5-based crypt() functions
  - ⊕ Notes for Crypt::PasswdMD5
    - Crypt::PasswdMD5 in the random_md5_salt function uses the built-in rand function to generate a salt
    - The built-in rand function is not appropriate for cryptographic use, as it is predictable and seeded by only 32 bits
    - Use Crypt::SysRandom or Crypt::URandom to generate random bytes instead of calling rand
    - Or use Crypt::URandom::Token to generate the salt directly without having to convert the bytes into base-64 characters
  - Crypt::PBKDF2 - The PBKDF2 password hashing algorithm.
  - ⊕ Notes for Crypt::PBKDF2
    - See PBKDF2::Tiny below
  - Crypt::Perl - Cryptography in pure Perl
  - ⊕ Notes for Crypt::Perl
    - Can create and sign in X509 in pure Perl. Slow without the XS addons
  - Crypt::PK::Ed25519 - Digital signature based on Ed25519
  - Crypt::PK::RSA - Crypt::PK::RSA - Public key cryptography based on RSA
  - Crypt::PostgreSQL - Module for generating encrypted password for PostgreSQL
  - Crypt::PQClean::Sign - Post-Quantum Cryptography with keypair
  - Crypt::PRNG - Cryptographically secure random number generator
  - ⊕ Notes for Crypt::PRNG
    - Part of CryptX
  - Crypt::Protocol - No POD
  - Crypt::Random::Source - Get weak or strong random data from pluggable sources
  - Crypt::Rhash - Compute message digests and magnet links
  - Crypt::RIPEMD160 - Perl extension for the RIPEMD-160 Hash function
  - Crypt::RSA::Blind - Blind RSA signatures
  - Crypt::SaltedHash - Perl interface to functions that assist in working with salted hashes - Deprecated
  - Crypt::ScryptKDF - Scrypt password based key derivation function
  - Crypt::SecretBuffer - Prevent accidentally leaking a string of sensitive data
  - Crypt::SMIME - S/MIME message signing, verification, encryption and decryption
  - Crypt::Sodium::XS - Perl XS bindings for libsodium
  - ⊕ Notes for Crypt::Sodium::XS
    - https://doc.libsodium.org/
  - Crypt::SysRandom - Perl interface to system randomness
  - Crypt::SysRandom::XS - Perl interface to system randomness, XS version
  - Crypt::TimestampedData - Read and write TimeStampedData files
  - ⊕ Notes for Crypt::TimestampedData
    - See TheRFCGuide for rfc5544
  - Crypt::URandom - Provide non blocking randomness
  - ⊕ Notes for Crypt::URandom
    - This is a pure-Perl module that reads data from /dev/urandom. It also uses Win32::API to read random bytes on Windows
  - Crypt::URandom::MonkeyPatch - Override core rand function to use system random sources - Deprecated
  - Crypt::URandom::Token - Generate secure strings for passwords, secrets and similar
  - Crypt::Util - A lightweight Crypt/Digest convenience API
  - Crypto::Utils - Utils
  - Crypt::xxHash - xxHash implementation for Perl
  - Crypt::Yescrypt - A Perl interface to the yescrypt password hash
  - CryptX - This is a huge crypto toolkit
  - ⊕ Notes for CryptX
    - Crypt::PRNG::ChaCha20 - Cryptographically secure PRNG based on ChaCha20 (stream cipher) algorithm. Used in UUID
    - Random numbers: CryptX::PrNG::Fortuna
    - App::xsum
  - Data::Entropy - Entropy (randomness) management - Deprecated
  - DBIx::Class::CryptColumn - Automatically hash password/passphrase columns
  - DBIx::Class::DigestColumns - Automatic digest columns
  - DBIx::Class::EncodedColumn - Automatically encode columns
  - DBIx::Class::InflateColumn::Authen::Passphrase - Inflate/deflate columns to Authen::Passphrase instances
  - DBIx::Class::PassphraseColumn - Automatically hash password/passphrase columns
  - Digest - Modules that calculate message digests
  - Digest::BLAKE2 - Message digest algorithm (which is an excellent security improvement: Bruce Scheiner)
  - Digest::CRC - Generic CRC functions
  - Digest::HMAC - Keyed-Hashing for Message Authentication
  - Digest::MD5 - Perl interface to the MD5 Algorithm
  - ⊕ Notes for Digest::MD5
    - But see Alt::Digest::MD5::OpenSSL above
  - Digest::Merkle::SHA256 - Pure-Perl SHA-256 Merkle Tree with Audit Proofs
  - ⊕ Notes for Digest::Merkle::SHA256
    - Merkle tree aka Hash Tree
  - Digest::Perl::MD5 - Perl implementation of Ron Rivest's MD5 Algorithm
  - Digest::prvhash64 - Variable length hashing
  - Digest::SHA - Perl extension for SHA-1/224/256/384/512. Built-in
  - Digest::SHA::PurePerl - Perl implementation of SHA-1/224/256/384/512
  - Digest::SHA3 - Perl extension for SHA-3
  - ⊕ Notes for Digest::SHA3
    - Prefer this to Digest::SHA
    - It supports many types of digests
  - Digest::xxHash - xxHash Implementation For Perl
  - ⊕ Notes for Digest::xxHash
    - But see Crypto::xxHash above
  - File::Digest - Calculate digests of files
  - Filter::Crypto - Create runnable Perl files encrypted with OpenSSL libcrypto
  - Filter::Crypto::Decrypt - Perl source code filter to run encrypted Perl files
  - File::SOPS - Perl implementation of Mozilla SOPS encrypted file format
  - Math::Random::ISAAC - Perl interface to the ISAAC PRNG algorithm
  - Math::Random::ISAAC::XS - C implementation of the ISAAC PRNG algorithm
  - Math::Random::MT - The Mersenne Twister PRNG
  - Math::Random::MT::Auto - Auto-seeded Mersenne Twister PRNGs
  - Math::Random::MTwist - The Mersenne Twist pseudorandom number generator
  - ⊕ Notes for Math::Random::MTwist
    - https://rt.cpan.org/Ticket/Display.html?id=171333
  - Math::Random::PCG32 - Minimal PCG random number generator
  - Math::Random::Secure - Cryptographically-secure, cross-platform replacement for rand()
  - Math::Random::Xorshift - A fast PRNG
  - Math::Random::Xoshiro256 - XS wrapper for xoshiro256** PRNG
  - Math::Rand48::Cursor - Move forward and backward in the drand48/rand() sequence
  - Monero::Keys - Module to generate Monero cryptocurrency compatible keys. Monero pulic key generation algorithm varies from standard Ed25519
  - Net::ACME2 - Client logic for the ACME (Let's Encrypt) protocol
  - ⊕ Notes for Net::ACME2
    - See also Crypt::LE
  - Net::Random - Get random data from online sources
  - Net::SSLeay - Perl bindings for OpenSSL and LibreSSL
  - PBKDF2::Tiny - Minimalist PBKDF2 (RFC 2898) with HMAC-SHA1 or HMAC-SHA2
  - Random::Any - Try to use Data::Entropy::Algorithms::rand(), fallback on builtin rand()
  - Random::Simple - Simple, usable, real world random numbers
  - Rand::URandom - Replaces rand() with /dev/urandom
  - ⊕ Notes for Rand::URandom
    - This is a pure-Perl module that makes syscalls to getrandom(2), but falls back to reading from /dev/urandom
  - Solana::SPLAddress - Perl extension for creating deterministic Solana token addresses
  - Sys::GetRandom - This is an XS module that calls getrandom(2) directly. It has a slightly different interface but is faster
  - Sys::GetRandom::PP - Pure Perl interface to getrandom(2)
  - Vigil::Crypt - Encryption and Hashing wrapper for ChaCha20-Poly1305 and Argon2
  - Vigil::Token - Cryptographically secure, URL-safe token generator for OTPs, sessions, and custom codes
- CssStuff
  - ⊕ See also
    - https://savage.net.au/misc/CSS.and.JS.Wiki.html
- CucumberGherkinPherkin
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - App::check_pherkin - Check_pherkin command interface
  - App::pherkin - Run Cucumber tests from the command line
  - Cucumber::Messages - Library of classes to encapsulate Cucumber messages
  - Cucumber::TagExpressions - Tag expression parser
  - Cucumber::Test::Release::Automation - In lib/Cucumber/Test/Release/Automation.pm
  - Data::Table::Gherkin - Lean Gherkin data table parser
  - ⊕ Notes for Data::Table::Gherkin
    - https://cucumber.io/docs/gherkin/reference/#data-tables
  - Gherkin - A parser and compiler for the Gherkin language
  - Test::BDD::Cucumber - Feature-complete Cucumber-style testing in Perl
- Dancer2
  - ⊕ See also
    - [Topic]
    - MeasureMetrics
  - Dancer2 - Lightweight yet powerful web application framework
  - Dancer2::Plugin::CryptPassphrase - Use Crypt::Passphrase with Dancer2
  - Dancer2::Plugin::Feed - Easy to generate feed rss or atom for Dancer2 applications
  - Dancer2::Plugin::LogReport - Logging, exceptions and translations in Dancer2 via Log::Report
  - Dancer2::Plugin::OIDC - OIDC protocol integration for Dancer2
- DatabaseAndSQL1
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://blogs.perl.org/users/usna78/2024/05/mariadb-10-and-sqltranslatorproducer.html
    - https://clickhouse.com/docs/interfaces/http
    - https://clickhouse.com/docs/interfaces/formats#native
    - Universal Database Tool
    - For DuckDB's feature-rich SQL dialect
    - For dig, similar to App::dnsq
    - For an important discussion of SQLite
    - https://redis.io/
    - https://sqlitebrowser.org/
    - For async techniques
    - For Turso DB
  - Alien::DuckDB - Find or build DuckDB
  - Alien::hiredis - Alien wrapper for hiredis
  - ⊕ Notes for Alien::hiredis
    - https://github.com/redis/hiredis
  - Alien::libpq - Find or build libpq PostgreSQL client library
  - Alien::MariaDB - Find or build libmariadb client library
  - Alien::sqlite_vec - Sqlite-vec SQLite extension for vector search
  - ⊕ Notes for Alien::sqlite_vec
    - https://github.com/asg017/sqlite-vec
  - AnyEvent::Redis - Non-blocking Redis client
  - App::DBBrowser - Browse SQLite/MySQL/PostgreSQL databases and their tables interactively
  - App::dbinfo - Get/extract information from database
  - App::dnsq - A full-featured dig-like DNS query tool
  - App::Sqitch - Sensible database change management
  - ⊕ Notes for App::Sqitch
    - http://sqitch.org/
  - App::SQLiteUtils - Utilities related to SQLite
  - App::dbitemplater - A utility for running a SQL query via DBI and using the output in a template
  - Async::Redis - Async Redis client using Future::IO
  - BerkeleyDB - Perl extension for Berkeley DB version 2, 3, 4, 5 or 6
  - Catmandu::DBI - Catmandu tools to communicate with DBI based interfaces
  - ⊕ Notes for Catmandu::DBI
    - This is (presumably) unrelated to Catmandu in DataTraversal
  - ClickHouse::Encoder - Fast XS encoder for ClickHouse Native format
  - ⊕ Notes for ClickHouse::Encoder
    - See also EV::ClickHouse
  - Couch::DB - CouchDB database client
  - CXC::DB::DDL - DDL for table creation, based on SQL::Translator::Schema
  - Data::ObjectDriver - Simple, transparent data interface, with caching
  - Data::Record::Serialize - Flexible serialization of a record
  - ⊕ Notes for Data::Record::Serialize
    - A module which encodes data in various ways and can further transmit the result
    - This module is primarily useful for output of sets of uniformly structured data records. It provides a uniform, thin, interface to various serializers and output sinks. Its raison d'etre is its ability to manipulate the records prior to encoding and output
  - Data::SimpleKV - A simple key-value database with memory cache and disk persistence
  - Data::TagDB - Work with Tag databases
  - ⊕ Notes for Data::TagDB
    - See also File::FStore, File::Sticker in FileHandling
  - Data::TagDB::Tag - Work with Tag databases
  - Database::Abstraction - Database abstraction layer
  - ⊕ Notes for Database::Abstraction
    - Abstract class giving read-only access to CSV, XML and SQLite databases via Perl without writing any SQL
  - Database::ManagedHandle - Manage database handles safely for long running processes
  - Database::Temp - Create an ad-hoc database which drops itself automatically
  - DB::Berkeley - XS-based OO Berkeley DB HASH interface
  - DB::Handy - Pure-Perl flat-file relational database with DBI-like interface
  - DB::Object - An SQL API much like DBI, but with the added benefits that it formats queries in a simple object oriented, chaining way
  - DB_File - Perl5 access to Berkeley DB version 1.x
  - DBD::AnyData - DBI access to XML, CSV and other formats
  - DBD::AnyData2 - A DBI driver for AnyData2
  - DBD::Avatica - Driver for Apache Avatica compatible servers
  - DBD::DB2 - DataBase Driver for IBM's DB2 Universal Database (UDB)
  - DBD::DuckDB - DuckDB database driver for the DBI module
  - DBD::D1 - DBI driver for Cloudflare D1 (serverless SQLite)
  - ⊕ Notes for DBD::D1
    - https://developers.cloudflare.com/d1/
  - DBD::Firebird - DBI driver for Firebird RDBMS server
  - DBD::KingBase - Kingbase database driver for the DBI module
  - DBD::libsql - DBI driver for libsql databases
  - DBD::Oracle - Oracle database driver for the DBI module
  - DBD::Patroni - DBI driver for PostgreSQL with Patroni cluster support
  - DBD::Pg - PostgreSQL database driver for the DBI module
  - DBD::PgAsync - A PostgreSQL database driver for the DBI module
  - DBD::SQLite - Self-contained RDBMS in a DBI Driver
  - DBD::SQLite::Constants - Common SQLite constants
  - DBD::Sybase - Sybase database driver for the DBI module
  - DBD::Unify - DBI driver for Unify database systems
  - DBD::XMLSimple - Access XML data via the DBI interface
  - DBI::Shell - Interactive command shell for the DBI
  - ⊕ Notes for DBI::Shell
    - Contains dbish
  - DBI::SQL::Nano - A very tiny SQL engine
  - DBIO - Native relational mapping for Perl, built on DBI
  - DBIO::DB2 - IBM DB2-specific schema management for DBIO
  - DBIO::DuckDB - DuckDB-specific schema management for DBIO
  - DBIO::Firebird - Firebird-specific schema management for DBIO
  - DBIO::GraphQL - Auto-generate a GraphQL schema from a DBIO schema
  - DBIO::MSSQL - Microsoft SQL Server-specific schema management for DBIO
  - DBIO::MySQL - MySQL-specific schema management for DBIO
  - DBIO::MySQL::Async - Async MySQL/MariaDB storage for DBIO via EV::MariaDB
  - DBIO::Oracle - Oracle-specific schema management for DBIO
  - DBIO::PostgreSQL::Age - Apache AGE graph database support for DBIO::PostgreSQ
  - DBIO::PostgreSQL::Async - Async PostgreSQL storage for DBIO via EV::Pg
  - DBIO::PostgreSQL::PostGIS - PostGIS spatial extension support for DBIO::PostgreSQL
  - DBIO::SQLite - SQLite-specific schema management for DBIO
  - DBIO::Sybase - Sybase-specific schema management for DBIO
  - DBIx::Abstract - DBI SQL abstraction
  - DBIx::Admin::TableInfo - A wrapper for all of table_info(), column_info(), *_key_info()
  - DBIx::Auto::Migrate - Wrap your database connections and automatically apply db migrations.
  - DBIx::AutoUpgrade::NativeStrings - Automatically upgrade Perl native strings to utf8 before sending them to the database
  - ⊕ Notes for DBIx::AutoUpgrade::NativeStrings
    - Primarily for DBD::Oracle, DPD::Pg and DBD::SQLite
  - DBIx::BatchChunker - Run large database changes safely
  - ⊕ Notes for DBIx::BatchChunker
    - For DML
    - See also DBIx::BulkLoader::Mysql, DBIx::Class::BatchUpdate, DBIx::BulkUtil
    - See also DBIx::OnlineDDL below for DDL
  - DBIx::Class - Generic Storage Handler
  - ⊕ Notes for DBIx::Class
    - See DBIx::QuickORM as a similar alternative, where the docs discuss and criticize DBIx::Class
    - Or consider simple alternatives like DBIx::Simple or DBIx::Squirrel
    - Or see the great article on DBIx::Class::Result::PrettyPrint at https://peateasea.de/introducing-dbix-class-resultset-prettyprint/
  - DBIx::Class::Async - Asynchronous database operations for DBIx::Class
  - DBIx::Class::EncodedColumn - Automatically encode columns
  - DBIx::Class::Helpers - Simplify the common case stuff for DBIx::Class
  - DBIx::Class::Helper::ColumnNames - Retrieve column names from a resultset
  - DBIx::Class::InflateColumn::Serializer - Inflators to serialize data structures for DBIx::Class
  - DBIx::Class::ParseError - Extensible database error handler
  - DBIx::Class::ParseError::Parser::MySQL - Parser for MySQL
  - DBIx::Class::ParseError::Parser::PostgreSQL - Parser for PostgreSQL
  - DBIx::Class::ParseError::Parser::SQLite - Parser for SQLite
  - DBIx::Class::Relationship::ManyToMany::Async - Many_to_many for DBIx::Class::Async â generates Future-returning
  - DBIx::Class::Schema - Composable schemas
  - DBIx::Class::Schema::GraphQL - Auto-generate a GraphQL schema from a DBIx::Class schema
  - DBIx::Class::Schema::Loader - Create a DBIx::Class::Schema based on a database
  - DBIx::Class::Storage::DBI - DBI storage handler
  - DBIx::Class::Storage::DBI::MariaDB - Storage::DBI class implementing MariaDB specifics
  - DBIx::Class::Storage::DBI::mysql::Retryable - MySQL-specific DBIC storage engine with retry support
  - DBIx::Connector - Fast, safe DBI connection and transaction management
  - DBIx::Connector::Retry - DBIx::Connector with block retry support
  - DBIx::Connector::Retry::MySQL - MySQL-specific DBIx::Connector with retry support
  - DBIx::Custom - DBI extension to execute insert, update, delete, and select easily
  - ⊕ Notes for DBIx::Custom
    - It extends Object::Simple
  - DBIx::DataModel - UML-based Object-Relational Mapping (ORM) framework
  - DBIx::Diff::Schema - Compare schema of two DBI databases
  - DBIx::Fast - DBI fast & easy (another one...)
  - DBIx::Lite - Chained and minimal ORM
  - ⊕ Notes for DBIx::Lite
    - This module tries very hard to do a lot of work for you
  - DBIx::Migration - Seamless DB schema up- and downgrades
  - DBIx::DBO - An OO interface to SQL queries and results
  - ⊕ Notes for DBIx::DBO
    - Easily constructs SQL queries, and simplifies processing of the returned data
  - DBIx::NamedParams - Use named parameters instead of '?'
  - DBIx::OnlineDDL - Run DDL on online databases safely
  - ⊕ Notes for DBIx::OnlineDDL
    - See also gh-ost
    - See also https://docs.percona.com/percona-toolkit/pt-online-schema-change.html
    - See also https://dev.mysql.com/doc/refman/8.4/en/innodb-online-ddl.html
  - DBIx::Otogiri - A lightweight medicine for using database
  - DBIx::ParseError::MySQL - Error parser for MySQL
  - DBIx::Placeholder::Named - DBI with named placeholders
  - DBIx::Query - Simplified abstracted chained DBI subclass
  - ⊕ Notes for DBIx::Query
    - A subclass of DBI
    - Can use Perl data structures described by SQL::Abstract::Complete
  - DBIx::Quick - Object Relational Mapping for the lazy programmer
  - DBIx::QuickDB - Quickly start a db server
  - ⊕ Notes for DBIx::QuickDB
    - PostgreSQL and MySQL are the initially supported drivers
  - DBIx::QuickORM - Actively maintained Object Relational Mapping that makes getting started Quick and has a rich feature set
  - ⊕ Notes for DBIx::QuickORM
    - An alternative to DBIx::Class, but not a drop-in replacement.
  - DBIx::Raw - Maintain control of SQL queries while still having a layer of abstraction above DBI
  - DBIx::RunSQL - Run SQL from a file
  - DBIx::Schema::DSL - DSL for Database schema declaration
  - DBIx::SearchBuilder - Encapsulate SQL queries and rows in simple Perl objects
  - DBIx::Simple - Very complete easy-to-use OO interface to DBI
  - DBIx::Simple::Concrete - Monkey-patch DBIx::Simple to use SQL::Concrete
  - DBIx::Simple::Interpol - Monkey-patch DBIx::Simple to use SQL::Interpol
  - DBIx::Skinny - Simple DBI wrapper/ORMapper
  - DBIx::Squirrel - A DBI extension
  - ⊕ Notes for DBIx::Squirrel
    - The DBIx::Squirrel package extends the DBI by providing a few extra conveniences that are subtle and additive in nature, and, hopefully, quite useful
    - Looks good
  - DBIx::Sunny - DBIx::Sunny is a simple DBI wrapper. It provides better usability for you
  - ⊕ Notes for DBIx::Sunny
    - DBIx::Sunny supports only SQLite and MySQL
    - Supports nested transaction management using DBIx::TransactionManager
    - See also SQL::Maker::SQLType
    - https://metacpan.org/pod/SQL::Maker::SQLType
  - DBIx::Wizard - Lightweight, chainable, zero-configuration ORM for Perl
  - DBM::Deep - A pure perl multi-level hash/array DBM that supports transactions
  - DiaColloDB - Diachronic collocation database, top-level
  - Fey - Better SQL Generation Through Perl
  - Fey::ORM - A Fey-based ORM
  - FalkorDB - Perl client module for FalkorDB
  - GraphViz2::DBI - Visualize a database schema as a graph
  - ⊕ Notes for GraphViz2::DBI
    - Uses DBIx::Admin::TableInfo
  - IO::Async::Pg - Async PostgreSQL client for IO::Async
  - KiokuDB - Object Graph storage engine
  - LMDB_File - Tie to LMDB (OpenLDAP's Lightning Memory-Mapped Database)
  - MMapDB - A simple database in shared memory
  - Mojo::Redis - Redis driver based on Mojo::IOLoop
  - MongoDB - Official MongoDB Driver for Perl (EOL)
  - ⊕ Notes for MongoDB
    - End of life: August 13, 2020
  - MooseX::Storage - A serialization framework for Moose classes
  - MorboDB - In-memory database, mostly-compatible clone of MongoDB
  - MySQL::Hi - Credentials for MySQL/MariaDB from config files
  - Neo4j::Bolt - Query Neo4j using Bolt protocol
  - Neo4j::Client - Build and use the libneo4j-omni library
  - Neo4j::Driver - Neo4j community graph database driver for Bolt and HTTP
  - Net::Async::Redis - Talk to Redis servers via IO::Async
  - OOPS - Object Oriented Persistent Store
  - OPTIMADE::PropertyDefinitions - Open Database API for Materials Design
  - ORLite - Extremely light weight SQLite-specific ORM
  - ORLite::Migrate - Extremely light weight SQLite-specific schema migration
  - Paws::DynamoDB::Response::Parser - Convert Paws DynamoDB response objects to Perl data structures
  - Pg::Explain - Object approach at reading explain analyze output
  - Pg::SQL::PrettyPrinter - Pretty printing SQL queries
  - PGObject::Util::DBAdmin - PostgreSQL Database Management Facilities for PGObject
  - PGXN::API - Maintain and serve a REST API to search PGXN mirrors
  - ⊕ Notes for PGXN::API
    - https://pgxn.org/
  - PGXN::Site - Maintain and serve a PGXN web site for talking to Postgres
  - PomBase::Chobo - Reading OBO files into a Chado database using PostgreSQL COPY
  - Pongo - A Perl MongoDB interface using XS and the MongoDB C driver
  - Protocol::Redis - Redis protocol parser/encoder with asynchronous capabilities.
  - Protocol::Redis::XS - hiredis based parser compatible with Protocol::Redis
  - Quote::LineProtocol - Helper module for Lineprotocol quoting
  - ⊕ Notes for Quote::LineProtocol
    - https://docs.influxdata.com/influxdb/v2/reference/syntax/line-protocol/
  - Redis - Perl binding for Redis database
  - ⊕ Notes for Redis
    - Redis is an in-memory data store
  - Redis::Cluster::Fast - A fast Perl binding for Redis Cluster
  - Redis::Fast - Perl binding for Redis database
  - Redis::hiredis - Interact with Redis using the hiredis client
  - RedisDB - Perl extension to access redis database
  - Rose::DB - A DBI wrapper and abstraction layer
  - Rose::DB::Object - Extensible, high performance object-relational mapper (ORM)
  - ⊕ Notes for Rose::DB::Object
    - Contains Rose::DB::Object::Tutorial - A guided tour of the basics of Rose::DB::Object
    - Contains Rose::DB::Object::Loader, Rose::DB::Object::Manager, etc
    - See also https://dev.to/dragostrif/rosedb-orm-and-perl-3dig
  - RRD::Fetch - Fetch information from a RRD file
  - Schema::Abstract - Abstract class for DB schemas
  - Schema::Test - Test schema versions for DBIx::Class
  - SQL::Abstract - Generate SQL from Perl data structures
  - ⊕ Notes for SQL::Abstract
    - Contains SQL::Abstract::ExtraClauses aka SQL::Abstract::Plugin::ExtraClauses etc
  - SQL::Abstract::Classic - Generate SQL from Perl data structures
  - SQL::Abstract::Complete - Generate complete SQL from Perl data structures
  - SQL::Abstract::More - Extension of SQL::Abstract with more constructs and more flexible API
  - SQL::Abstract::Plugin::TableAlias - Automagical table aliasing
  - ⊕ Notes for SQL::Abstract::Plugin::TableAlias
    - This module is an extension of the SQL::Abstract::Plugin::ExtraClauses plugin
  - SQL::Beautify - Beautify SQL statements by adding line breaks indentation
  - SQL::Concat - SQL concatenator, only cares about bind-vars, to write SQL generator
  - SQL::Inserter - Efficient buffered DBI inserter and fast INSERT SQL builder
  - SQL::Interp - Interpolate Perl variables into SQL statements
  - ⊕ Notes for SQL::Interp
    - Includes DBIx::Interp
    - POD discusses Class::DBI, DBIx::Simple, FU::SQL, SQL::Abstract, SQL::Interpol, SQL::KeywordSearch, SQL::Preproc and SQL::String
  - SQL::Maker - Yet another SQL builder
  - SQL::Object - Yet another SQL condition builder
  - SQL::QueryMaker - Helper functions for SQL query generation
  - SQL::Parser - Validate and parse SQL strings
  - ⊕ Notes for SQL::Parser
    - This module is part of SQL::Statement
    - https://metacpan.org/dist/SQL-Statement
  - SQL::Shell - Command interpreter for DBI shells
  - SQL::SimpleOps - SQL Simple Operations
  - SQL::Tokenizer - A simple SQL tokenizer
  - SQL::Translator - Manipulate structured data definitions (SQL and more)
  - SQL::Translator::Producer::DBIxSchemaDSL - DBIX::Schema::DSL specific producer for SQL::Translator
  - SQL::Translator::Producer::GraphQL - GraphQL schema producer for SQL::Translator
  - SQLite::Work - Report on and update an SQLite database
  - SQLite::VecDB - SQLite as a vector database using sqlite-vec
  - SQL::Wizard - Composable SQL query builder with expression trees
  - Store::Indexed - A fast, key-indexed data store with dual XS and Pure-Perl backends
  - Tangram - Store pure objects in standard relational databases
  - TDB_FileX - Perl access to the trivial database library
  - TMDB - Perl wrapper for The MovieDB API
  - TheSchwartz - A reliable job queue
  - TheSchwartz::Simple - Lightweight TheSchwartz job dispatcher using plain DBI
  - TheSchwartz::JobScheduler - Lightweight TheSchwartz job dispatcher with maintained database connections
  - WWW::PGXN - Interface to PGXN mirrors and the PGXN API
  - Yote::SQLObjectStore - Rooted tree based Object Store atop SQL
  - ⊕ Notes for Yote::SQLObjectStore
    - See also Yote::Spiderpup
  - Yote::YapiServer - HTTP server for Yote API
  - ⊕ Notes for Yote::YapiServer
    - Built on top of Yote::SQLObjectStore
- DatabaseAndSQL2
  - ⊕ See also
    - [Topic]
    - [Topic]
    - https://arango.ai/
  - Arango::Tango - A simple interface to ArangoDB REST API
  - ArangoDB - ArangoDB client for Perl
  - ArangoDB2 - ArangoDB 2.x HTTP API Interface
  - DBIO - Native relational mapping for Perl, built on DBI
  - DBIO::Async - Shared, loop-agnostic async layer for DBIO drivers
  - DBIO::DB2 - IBM DB2-specific schema management for DBIO
  - DBIO::DuckDB - DuckDB-specific schema management for DBIO
  - DBIO::Firebird - Firebird-specific schema management for DBIO
  - DBIO::Forked - Dependency-free, fork-based async layer for DBIO drivers
  - DBIO::GraphQL - Auto-generate a GraphQL schema from a DBIO schema
  - DBIO::Manual - Index of the Manual
  - DBIO::MSSQL - Microsoft SQL Server-specific schema management for DBIO
  - DBIO::MySQL - MySQL-specific schema management for DBIO
  - DBIO::MySQL::EV - Async MySQL/MariaDB storage for DBIO via EV::MariaDB
  - DBIO::Oracle - Oracle-specific schema management for DBIO
  - DBIO::PostgreSQL - PostgreSQL-specific schema management for DBIO
  - DBIO::PostgreSQL::Age - Apache AGE graph database support for DBIO::PostgreSQL
  - DBIO::PostgreSQL::EV - Async PostgreSQL storage for DBIO via EV::Pg
  - DBIO::PostgreSQL::PostGIS - PostGIS spatial extension support for DBIO::PostgreSQL
  - DBIO::SQLite; - SQLite-specific schema management for DBIO
  - DBIx::HTML - Just another HTML table generating DBI extension
- DataTraversal
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - Data::Fake
    - Data::Grid
    - Data::Table::Text - Write data in tabular text format. Very flexible. Vast list of methods. Aimed at Amazon Web Services
    - Data::Transmute
    - [Topic]
    - Data::Validation
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Text::Table::Manifold - Has many features & its See Also lists about similar 40 modules
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For Smile format specification
    - OpenRefine is a powerful free, open source tool for working with messy data
    - For info about Prof Robert Sedgewick who often worked with trees
  - Acme::CPANModules::PickingRandomLinesFromFile - List of modules to pick random lines from a file
  - Acme::CPANModules::PickingRandomItemsFromList - List of modules to pick random items from a list
  - Algorithm::Numerical::Sample - Draw samples from a set
  - Algorithm::CurveFit - Nonlinear Least Squares Fitting
  - Algorithm::Heapify::XS - Perl extension for supplying simple heap primitives for arrays
  - Algorithm::QuadTree - A QuadTree Algorithm class in pure Perl
  - Algorithm::QuadTree::XS - XS backend for Algorithm::QuadTree
  - Algorithm::SlidingWindow - Fixed-capacity rolling window (overwrite-oldest)
  - Algorithm::SlidingWindow::Dynamic - Generic, dynamically sized sliding window
  - App::abgrep - Print lines matching a pattern. Has many options
  - App::Bin::Search - Base class for bin-search tool
  - App::BloomUtils - Utilities related to bloom filters
  - App::bookmarks - Export bookmarks from browsers and files
  - App::ccdiff - Colored Character diff
  - App::csvtool - Implements the csvtool core commands
  - App::CSVUtils - CLI utilities related to CSV
  - ⊕ Notes for App::CSVUtils
    - The module contains 64 scripts
  - App::DataBrowseUtils - CLI utilities related to browsing data structures
  - App::DPath - A Cmdline tool around Data::DPath (see below)
  - App::DataSizeSpeedUtils - Utilities related to data size/speed
  - App::Greple - Extensible grep with lexical expression and region control
  - App::Greple::aozora - Greple module for aozora-bunko proofreading
  - ⊕ Notes for App::Greple::aozora
    - The work of comparing and contrasting the input data with the original manuscript such as the base text and the input data is called "calibration" and searching for mistakes
  - App::Greple::charcode - Greple module to annotate unicode character data
  - ⊕ Notes for App::Greple::charcode
    - Greple module -Mcharcode (or -Mcc for short) displays information about the matched characters. It can also visualize Unicode zero-width combining or hidden characters, which can be useful for examining text containing visually indistinguishable or imperceptible elements
    - The POD page https://metacpan.org/pod/App::Greple::charcode shows various outputs worthy of close study
  - App::Greple::pw - Module to get password from file
  - App::Greple::stripe - Greple zebra stripe module. Produces coloured background bars of output
  - App::Greple::subst - Greple module for text search and substitution
  - App::Greple::tee - Module to replace matched text by the external command result
  - App::Greple::wordle - Wordle module for greple
  - App::Greple::xlate - Translation support module for greple
  - ⊕ Notes for App::Greple::xlate
    - This module is amazing. Check the demo
    - https://metacpan.org/pod/App::Greple::xlate
  - App::Greple::xp - Extended pattern module
  - App::nauniq - Non-adjacent uniq
  - App::PickRandomLines - Pick one or more random lines from input
  - App::remotediff - Remote diff over rsync
  - App::sdif - sdif (side-by-side) and family tools, cdif (visual char diff) and watchdiff (repetition of diff)
  - App::td - Does for tables what jq does for JSON. Has a huge range of options
  - ⊕ Notes for App::td
    - Can be used in conjunction with csv2td from App::CSVUtils
  - App::uricolor - Colorize URIs with ANSI colors
  - App::wordlist - Grep words from (or test them against) WordList::*
  - App::wordlist::wordle - A wordlist wrapper to help solve Wordle
  - Archive::BagIt - The main module to handle bags
  - Array::Contains - Check if an array contains a specific element
  - Array::Sample::Partition - Sample elements from an array by equal partitions
  - Array::Sample::SimpleRandom - Sample elements randomly (with or without replacement)
  - Array::Sample::SysRand - Systematic random sampling from an array
  - Array::Sample::WeightedRandom - Sample elements randomly, with weights (with or without replacement)
  - assign - Destructuring Assignment Syntax for Perl
  - ⊕ Notes for assign
    - Instead of assigning a value to a variable, you can now assign to a data structure (array-ref or hash-ref) that specifies how to unpack a data structure into all the variables you need
  - Attribute::Handlers - Simpler definition of attribute handlers
  - autobox - Call methods on native types
  - autobox::Lookup - Easy autoboxed lookup
  - autobox::Text - Turns baubles into trinkets
  - autobox::Time::Piece - On-the-fly date conversion
  - BsDiPa - Create or apply binary difference patch
  - Catmandu - A data toolkit
  - ⊕ Notes for Catmandu
    - This is (presumably) unrelated to Catmandu in DatabaseAndSQL1
  - Class::XPath - Adds xpath matching to object trees
  - Clone - Recursively copy Perl datatypes
  - Clone::AsUTF8Bytes - Recursively copy Perl data converting to UTF-8 bytes
  - Codec::CBOR - DAG-CBOR encoder and decoder
  - Connector - A generic connection to a hierarchical-structured data set
  - csvgrep - Search for patterns in a CSV and display results in a table
  - CXC::Data::Visitor - Invoke a callback on every element at every level of a data structure.
  - Data::Alias - Comprehensive set of aliasing operations
  - ⊕ Notes for Data::Alias
    - See also Data::Reuse
  - Data::Clone - Polymorphic data cloning
  - ⊕ Notes for Data::Clone
    - Does data cloning, i.e. copies things recursively
  - Data::Compare - Compare perl data structures
  - Data::Diff - Data structure comparison module
  - Data::Difference - Compare simple hierarchical data
  - Data::DPath - DPath is not XPath!
  - ⊕ Notes for Data::DPath
    - With this module you can address points in a datastructure by describing a 'path' to it using hash keys, array indexes or some wildcard-like steps. It is inspired by XPath but differs from it
  - Data::DRef - Delimited-key access to complex data structures
  - Data::Edit::Xml - Edit data held in the XML format
  - ⊕ Notes for Data::Edit::Xml
    - This intriguing module has a huge POD full of example code
  - Data::Edit::Xml::Reuse - Reuse Xml via the Dita conref facility
  - Data::FastPack - FastPack Record format, Parsing and Serialising
  - Data::Filter::Abstract - Generate Perl filter subs from data structures
  - Data::HexDump - Hexadecimal Dumper
  - ⊕ Notes for Data::HexDump
    - Contains links to 8 other dumpers
  - Data::JavaScript - Dump perl data structures into JavaScript code
  - Data::JavaScript::Anon - Dump big dumb Perl structs to anonymous JavaScript structs
  - Data::JavaScript::LiteObject - Lightweight data dumping to JavaScript
  - Data::LNPath - Lookup on nested data via path
  - Data::Match - Complex data structure pattern matching
  - Data::MessagePack::Stream - Yet another messagepack streaming deserializer
  - Data::MessagePack::Unpacker - Messagepack streaming deserializer - Deprecated
  - Data::Mirror - A simple way to efficiently retrieve data from the World Wide Web
  - ⊕ Notes for Data::Mirror
    - Handles JSON objects, YAML documents, XML instances and CSV files
    - Can create objects, files, file handles and strings
  - Data::Munge - Various utility functions
  - Data::NestedKey - Object-oriented handling of deeply nested hash structures
  - ⊕ Notes for Data::NestedKey
    - Uses dot-separated keys to access nested hashes
  - Data::Page - Help when paging through sets of results
  - Data::Pageset - Page numbering and page sets
  - Data::Pageset::Exponential - Page numbering for very large page numbers
  - Data::Path::XS - Fast path-based access to nested data structures
  - Data::Peek - A collection of low-level debug facilities
  - Data::Pretty - Data Dump Beautifier
  - Data::Printer - Colored & full-featured pretty print of Perl data structures and objects
  - ⊕ Notes for Data::Printer
    - Does some things very well, but apparently does not handle expressions being passed to p(...)
  - Data::Printer::Filter - Create powerful stand-alone filters for Data::Printer
  - Data::Printer::Filter::EscapeNonPrintable - Escape missing ASCII nonprintable characters
  - Data::Printer::Filter::JMAP - A Data::Printer filter for JMAP::Tester-related objects
  - Data::Printer::Filter::StructDumb - A Data::Printer filter for Struct::Dumb
  - Data::Record::Serialize - Flexible serialization of a record
  - Data::Record::Serialize::Encode::csv - Encode a record as csv
  - Data::Record::Serialize::Encode::dbi - Store a record in a database
  - Data::Record::Serialize::Encode::table - Encode records as a formatted table and output it
  - Data::Record::Serialize::Role::Encode - Encode Role
  - Data::Record::Serialize::Role::Sink - Sink Role
  - Data::Reuse - Share constant values with Data::Alias
  - Data::Rmap - Recursive map, apply a block to a data structure
  - Data::RenderAsTree - Render any data structure as an object of type Tree::DAG_Node
  - ⊕ Notes for Data::RenderAsTree
    - See Tree::Simple::View & its See Also
  - Data::Roundtrip - Convert between Perl data structures, YAML and JSON with unicode support (I believe ...)
  - Data::Serializer - Modules that serialize data structures
  - Data::Section - Read multiple, named, chunks of data out of your __DATA__ section
  - Data::Section::Pluggable - Read structured data from __DATA__
  - Data::Section::Simple - Read multiple, named, chunks of data out of your __DATA__ section
  - Data::Section::Writer - Write __DATA__ section files for Data::Section, Data::Section::Simple or Mojo::Loader::data_section
  - Data::Show - Dump data structures with name and point-of-origin
  - Data::Smile - Encoder/decoder for Smile data
  - Data::Smile::XS - XS encoder/decoder for Smile data
  - Data::Table - Data type related to database tables, spreadsheets, CSV/TSV files, HTML table displays, etc
  - Data::Table::Excel - Convert between Data::Table objects and Excel (xls/xlsx) files
  - Data::Table::Gherkin - Lean Gherkin data table parser
  - ⊕ Notes for Data::Table::Gherkin
    - https://cucumber.io/docs/gherkin/reference/#data-tables
  - Data::TableData::Lookup - Lookup value in a table data structure
  - Data::TableData::Object - Manipulate table-like data structure via table object
  - Data::TableData::Pick - Pick randomly one or more table rows, with some options
  - Data::TableData::Rank - Add a rank column to a table
  - Data::TableReader - Extract records from "dirty" tabular data sources
  - Data::Tools - Provides set of basic functions for data manipulation
  - Data::Transfigure - Performs rule-based data transfigurations of arbitrary structures
  - Data::Transform - Performs rule-based data transformations of arbitrary structures
  - Data::Traverse - Callback-based depth-first traversal of Perl data structures
  - Data::TreeDumper - Improved replacement for Data::Dumper. Powerful filtering capability
  - ⊕ Notes for Data::TreeDumper
    - See Tree::Simple::View & its See Also
  - Data::Unixish - Implementation for Unixish, a data transformation framework
  - Data::Unixish::pick - Pick one or more random items
  - Data::Visitor - Visitor style traversal of Perl data structures
  - Data::Visitor::Lite - An easy implementation of Data::Visitor::Callback
  - Data::Visitor::Tiny - Recursively walk data structures
  - Data::Walk - Traverse Perl data structures
  - Data::Walker - A tool for navigating through Perl data structures
  - Datafile::Array - Pure-Perl utilities for reading and writing delimited data files
  - Datafile::Hash - Pure-Perl utilities for datafiles and INI-style config files with multi-level sections
  - DBIx::Array - DBI Wrapper with Perl style data structure interfaces
  - DBIx::Class::MaterializedPath - Efficiently retrieve and search trees with DBIx::Class
  - DBIx::HTML - Just another HTML table generating DBI extension
  - DBIx::Tree - Generate a tree from a self-referential database table
  - DBIx::Tree::MaterializedPath - Fast DBI queries and updates on "materialized path" trees
  - Devel::Walk - Walk a complex object or reference
  - Directory::Diff - Recursively find differences between similar directories
  - Doubly - Thread-safe doubly linked list
  - ⊕ Notes for Doubly
    - This module provides access to a C-based doubly linked list
  - Doubly::Linked - Doubly linked lists
  - ⊕ Notes for Doubly::Linked
    - But see Doubly just above
  - Doubly::Linked::PP - Linked lists
  - File::LoadLines - Load lines from files and network
  - ⊕ Notes for File::LoadLines
    - Handles URLs, encoding and line terminators
  - File::Random - Perl module for random selecting of a file
  - File::RandomLine - Retrieve random lines from a file
  - File::Random::Pick - Pick random lines from a file, without duplicates
  - Forest - A collection of n-ary tree related modules
  - Google::ProtocolBuffers - Simple interface to Google Protocol Buffers
  - ⊕ Notes for Google::ProtocolBuffers
    - http://code.google.com/p/protobuf/
  - Hash::Path - A simple way to return a path of HoH
  - Heap::PQ - Binary heap (priority queue)
  - IO::Pager - Select a pager (possibly perl-based) & pipe it text if a TTY
  - Iterator - A general-purpose iterator class
  - Iterator::DBI - An iterator for returning DBI query results
  - Iterator::Diamond - Iterate through the files from ARGV
  - Iterator::Flex - Iterators with flexible behaviors
  - Iterator::IO - Filesystem and stream iterators
  - Iterator::Misc - Miscellaneous iterator functions
  - Iterator::Simple - Simple iterator and utilities
  - ⊕ Notes for Iterator::Simple
    - POD says: About 10 times faster than Iterator::Util
  - Iterator::Util - Essential utilities for the Iterator class
  - ⊕ Notes for Iterator::Util
    - Uses Iterator
    - But see Iterator::Simple
  - List::AllUtils - Combines List::Util, List::SomeUtils and List::UtilsBy in one bite-sized package
  - List::BinarySearch - Binary Search within a sorted array.
  - List::BinarySearch::PP - Pure-Perl Binary Search functions
  - List::BinarySearch::XS - Binary Search a sorted array with XS routines
  - List::Compare - Compare elements of two or more lists
  - List::Gen - Provides functions for generating lists
  - List::Insertion - Binary search a list for insertion point
  - List::Lazy - Generate lists lazily
  - List::Regexp - Convert list of strings to a regular expression
  - ⊕ Notes for List::Regexp
    - Includes regexp-opt
  - List::Util - A selection of general-utility list subroutines
  - List::Util::Find - List utilities related to finding items
  - List::Uniqnum - A rendition of List::Util::uniqnum minus the bugs
  - Loop::Util - Loop helper keywords
  - LTSV::LINQ - LINQ-style query interface for LTSV files
  - ⊕ Notes for LTSV::LINQ
    - https://learn.microsoft.com/en-us/dotnet/csharp/linq/
  - Number::Finance::Human - Human-readable numbers for accounting and finance
  - Number::Iterator - The great new Number::Iterator!
  - Number::Iterator::XS - Iterate numbers faster
  - NumSeq::Iter - Generate a coderef iterator from a number sequence specification
  - Object::Iterate - Iterators for objects that know the next element
  - Object::Meta - Library to manage data and meta data as one object but keeping it separate
  - OLE::Storage - An Interface to Structured Storage Documents
  - OLE::Storage_Lite - Simple Class for OLE document interface
  - OMOP::CSV::Validator - Validates OMOP CDM CSV files against their expected data types
  - Perl6::Caller - Routines for manipulating stashes
  - Parse::CSV - Highly flexible CSV parser for large files
  - Parser::FIT - A parser for garmin FIT (Flexible and Interoperable Data Transfer) files
  - Quantum::Superpositions - QM-like superpositions in Perl
  - ⊕ Notes for Quantum::Superpositions
    - Not for the eigen-challenged
  - Random::Skew - Set up a pool of items to return one of, randomly - with some more likely than others
  - Random::Skew::Test - Handy means for testing (and fine tuning) Random::Skew
  - Search::Tokenizer - Decompose a string into tokens (words)
  - Syntax::Keyword::Junction - Perl6 style Junction operators in Perl5
  - ⊕ Notes for Syntax::Keyword::Junction
    - Essentially a fork of Perl6::Junction without the name Perl6
    - Perl6::Junction - Perl6 style Junction operators in Perl5
  - Scalar::List::Utils - A distribution of general-utility subroutines
  - ⊕ Notes for Scalar::List::Utils
    - Contains Sub::Util
  - Search::Trigram - Trigram inverted index search with Dice coefficient scoring
  - Sim::OPT - OPT is an optimization and parametric exploration program favouring problem decomposition
  - Storable - Persistence for Perl data structures
  - Storable::Improved - Storable improved with core flaws mitigated
  - Term::Table - Format a header and rows into a table
  - Term::TablePrint - Print a table to the terminal and browse it interactively
  - Text::Aligner - Its single function align() is used to justify strings to various alignment styles
  - Text::ANSITable - Create nice formatted tables using extended ASCII and ANSI colors
  - Text::ASCIITable - Create a nice formatted table using ASCII characters
  - Text::ASCIITable::EasyTable - Create ASCII tables from an array of hashes
  - Text::AutoCSV - Helper module to automate the use of Text::CSV
  - Text::FormatTable - Format text tables
  - Text::NumericData - Many tools for parsing and writing of textual numeric data files
  - Text::Pipe - Common text filter API
  - ⊕ Notes for Text::Pipe
    - This is a clever module for pipelining textual transformations
    - It has about 30 sub-modules
  - Text::SimpleTable - Simple eye candy ASCII Tables
  - Text::Table - Organize Data in Tables
  - Text::Table::Manifold - Render tables in manifold formats
  - Text::Table::Tiny - Generate simple text tables from 2D arrays
  - Text::Treesitter - Perl binding for tree-sitter
  - ⊕ Notes for Text::Treesitter
    - Tree-sitter aims to be: General enough to parse any programming language
    - https://github.com/tree-sitter
    - https://github.com/tree-sitter-perl/
  - Text::Treesitter::Bash - Parse Bash with Text::Treesitter and extract executable commands
  - Text::Table::Read::RelationOn::Tiny - Read binary "relation on (over) a set" from a text table
  - Tie::Pick - Randomly pick (and remove) an element from a set
  - Tree - An N-ary tree
  - ⊕ Notes for Tree
    - Contains Tree::Binary2
    - Has an important See Also
  - Tree::Binary - An Object Oriented Binary Tree for Perl
  - Tree::Binary::Dictionary - A dictionary API to a binary tree
  - ⊕ Notes for Tree::Binary::Dictionary
    - Not related to Tree::Binary, with a primitive POD
  - Tree::Binary::XS - Perl extension for manipulating binary tree structure
  - ⊕ Notes for Tree::Binary::XS
    - Not compatible with Tree::Binary
  - Tree::Cladogram - Render a cladogram using Imager or Image::Magick
  - Tree::DAG_Mode - An N-ary tree
  - ⊕ Notes for Tree::DAG_Mode
    - See also Data::RenderAsTree
  - Tree::MultiNode - A multi-node tree object. Most useful for modeling hierarchical data structures
  - Tree::Parser - Module to parse formatted files into tree structures
  - Tree::R - Perl extension for the R-tree data structure and algorithms
  - ⊕ Notes for Tree::R
    - See also Tree::STR
  - Tree::Simple - A simple tree object
  - ⊕ Notes for Tree::Simple
    - Has an important See Also
  - Tree::Simple::View - A set of classes for viewing Tree::Simple hierarchies
  - ⊕ Notes for Tree::Simple::View
    - Has an important See Also
  - Tree::Simple::VisitorFactory - A factory object for dispensing Visitor objects
  - Tree::STR - A Sort-Tile-Recursive tree index
  - ⊕ Notes for Tree::STR
    - See also Geo::Geos::Index::STRtree
  - Tree::Ternary - Perl implementation of ternary search trees
  - Tree::Trie - A data structure optimized for prefix lookup
  - Tree::Visualize - A module for visualizing Tree structures
  - Tree::XPathEngine - A re-usable XPath engine
  - Util::Medley::List - Utility methods for working with lists
  - WordListRole::Bloom - Provide word_exists() that uses bloom filter
  - XML::XPathEngine - A re-usable XPath engine for DOM-like trees
- DataTypes
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Types::Standard - for Type::Tiny
    - https://tc39.es/ecma426/#sec-base64-vlq
    - https://www.inkandswitch.com/tangents/bijou64/
    - https://wiki.haskell.org/Newtype
    - For data types in SQLite
  - Acme::Bitfield - Bitmask for Tracking Boolean Sets
  - Acme::AsciiEmoji - Emoji
  - App::CrockfordBase32Utils - Utilities related to Crockford's Base 32 encoding
  - ⊕ Notes for App::CrockfordBase32Utils
    - https://www.crockford.com/base32.html
  - Attribute::Lexical - Sane scoping of function/variable attributes
  - Basic::Types::XS - Fast but limited type constraints
  - CEFACT::Unit - CEFACT unit handling
  - ⊕ Notes for CEFACT::Unit
    - Uses Data::CEFACT::Unit below
  - Contract::Declare - Simple contract system for Perl interfaces
  - Convert::Binary::C - Binary Data Conversion using C Types
  - Convert::VLQ - Convert to and from VLQ base64 representation used in source maps
  - Data::CEFACT::Unit - Data object for CEFACT unit
  - ⊕ Notes for Data::CEFACT::Unit
    - See CEFACT::Unit above
  - Data::Float - Details of the floating point data type
  - Data::Frame - This implements a data frame container that uses PDL for individual columns
  - Data::HashType - Data object for hash type
  - Data::HexConverter - High performance hex string to binary converter
  - Data::IconText - Work with icon text
  - Data::Identifier - Format independent identifier object
  - Data::Identifier::Cloudlet - Format independent identifier object
  - Data::Identifier::Generate - Format independent identifier object
  - Data::Identifier::Interface::Known - Format independent identifier object
  - Data::Identifier::Interface::Simple - Format independent identifier object
  - Data::Identifier::Interface::Subobjects - Format independent identifier object
  - Data::Identifier::Interface::Userdata - Format independent identifier object
  - Data::InfoBox - Data object for info box
  - Data::Integer - Details of the native integer data type
  - Data::Login - Data object for login
  - Data::Message::Board - Data object for Message board
  - Data::Metadata - Data object for metadata
  - Data::OFN::Common - OFN common data objects
  - Data::OFN::Thing - Data object for OFN thing
  - Data::OptList - Parse and validate simple name/value option pairs
  - ⊕ Notes for Data::OptList
    - Used by the pragma 'syntax'
  - Data::OptList::Object - Data::OptList, but object-oriented
  - Data::Perl - Base classes wrapping fundamental Perl data types.
  - ⊕ Notes for Data::Perl
    - Data::Perl is a collection of classes that wrap fundamental data types that exist in Perl
  - Data::Pond - Perl-based open notation for data
  - Data::TagMap - Module for working with tag maps
  - Data::Text::Simple - Data object for text in language
  - Data::Types - Validate and convert data types
  - DefHash - Define things according to a specification, using hashes
  - ⊕ Notes for DefHash
    - See DefHash in various places in this para
  - Encode::BetaCode - Perl module for converting to and from Beta Code
  - ⊕ Notes for Encode::BetaCode
    - http://en.wikipedia.org/wiki/Beta_code
  - Encode::Bijou64 - Encode and decode Bijou64 integers
  - Encode::RAD50 - Convert to and from the Rad50 character set
  - Enum::Declare - Declarative enums for Perl with compile-time constants
  - Enum::Declare::Common - A curated collection of commonly-needed enums
  - Format::Human::Bytes - Format a bytecount and make it human readable
  - Hash::DefHash - Manipulate defhash
  - ⊕ Notes for Hash::DefHash
    - See DefHash in various places in this para
  - Hydrogen - Utilities for the simplest elements of Perl
  - Keyword::Anonymous::Object - Anonymous objects
  - MooseX::Types - Organize your Moose types in libraries
  - MooseX::Types::DateTime - DateTime related constraints and coercions for Moose
  - MooseX::Types::DateTime::MoreCoercions - Extensions to MooseX::Types::DateTime
  - MooX::HandlesVia - NativeTrait-like behavior for Moo.
  - ⊕ Notes for MooX::HandlesVia
    - But prefer Sub::HandlesVia below
  - Newtype - Perl implementation of an approximation for Haskell's newtype
  - Number::Bytes::Human - Convert byte count to human readable format
  - Number::Format - Perl extension for formatting numbers
  - Number::Format::Metric - Format number with metric prefix, with some options
  - Perl::Types - Enable Perl data types
  - Range::Merge - Merges ranges of data including subset/superset ranges
  - Regexp::Pattern::DefHash - Regexp patterns related to DefHash
  - ⊕ Notes for Regexp::Pattern::DefHash
    - See DefHash in various places in this para
  - Rope - Tied objects
  - Scalar::Number - Numeric aspects of scalars
  - Scalar::Readonly - Functions for controlling whether any scalar variable is read-only
  - Scalar::ValueTags - Attach propagated metadata to data values
  - Specio - Type constraints and coercions for Perl
  - String::BooleanSimple - Gets the boolean representative of a string
  - Struct::Dumb - Make simple lightweight record-like structures
  - Sub::HandlesVia - Alternative handles_via implementation
  - ⊕ Notes for Sub::HandlesVia
    - Replaces MooX::HandlesVia above for trait handling
  - Sub::HandlesVia::XS - XS parts for Sub::HandlesVia; no user-serviceable parts inside
  - Tie::BoundedInteger - Limit the magnitude of a number in a scalar
  - Tie::Cycle - Cycle through a list of values via a scalar
  - Tie::Toggle - False and true, alternately, ad infinitum
  - ⊕ Notes for Tie::Toggle
    - An endless series of Booleans
  - Type::Guess - Infer data types from an array of scalars
  - Type::Library - Tiny, yet Moo(se)-compatible type libraries
  - Type::Params - Sub signature validation using Type::Tiny type constraints and coercions
  - ⊕ Notes for Type::Params
    - https://blogs.perl.org/users/toby_inkster/2023/02/using-typeparams-effectively.html
  - Type::Registry - A glorified hashref for looking up type constraints
  - Type::Tiny - Tiny, yet Moo(se)-compatible, type constraint
  - ⊕ Notes for Type::Tiny
    - Contains Types::Standard and many other modules
  - Type::Tiny::Class - Type constraints based on the "isa" method
  - Types::Capabilities - Don't care what type of data you are given, just what you can do with it
  - Types::Common - The one stop shop
  - Types::Common::Numeric - Commonly used numeric types
  - ⊕ Notes for Types::Common::Numeric
    - Drop-in replacement for MooseX::Types::Common::Numeric
  - Types::Common::String - Commonly used string types
  - Types::Equal - Type constraints for single value equality
  - Types::Music - Type Library for Music Programming
  - Win32::API::Struct - C struct support package for Win32::API
  - XDR - External Data Representation Standard
  - ⊕ Notes for XDR
    - A file of constants
  - XDR::Gen - Generator for XDR (de)serializers
  - XDR::Parse - Creation of an AST of an XDR specification
  - ⊕ Notes for XDR::Parse
    - See RfcGuide for rfc4506
- DataValidation
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - OpenRefine is a powerful free, open source tool for working with messy data
    - https://en.wikipedia.org/wiki/PESEL
  - App::SahUtils - Collection of CLI utilities for Sah and Data::Sah
  - Attribute::Signature - Allows you to define a call signature for subroutines
  - Attribute::Validate - Validate your subs with attributes
  - Alt::Params::Util::PLICEASE - Simple, compact and correct param-checking functions
  - ⊕ Notes for Alt::Params::Util::PLICEASE
    - Contains Params::Util
  - Brick - Complex business rule data validation
  - ⊕ Notes for Brick
    - See also Brick::Tutorial, Brick::UserGuide
  - CGI::ArgChecker - An extensible CGI parameter validation module (allowing commonly used checks on parameters to be called more concisely and consistently)
  - CGI::FormMagick::Validator - Validate data from FormMagick forms
  - CGI::Validate - Advanced CGI form parser and type validation
  - Class::ParmList - Methods for processing named parameter lists
  - Class::Utils - Class utilities
  - Data::Censor - Censor sensitive stuff in a data structure
  - Data::Checks - Value constraint checking
  - Data::Constraint - Prototypical value checking
  - Data::Domain - Data description and validation
  - ⊕ Notes for Data::Domain
    - See also CGI::Expand and Test::InDomain
  - Data::FormValidator - Validates user input (usually from an HTML form) based on input profile
  - ⊕ Notes for Data::FormValidator
    - http://mark.stosberg.com/Tech/perl/form-validation/
  - Data::FormValidator::Tutorial - A tutorial!
  - Data::FormValidator::Util::HTML - HTML utility functions for DFV
  - Data::Message::Simple - Data object for simple message
  - Data::Processor - A tool for transforming, verifying, and producing Perl data structures from / against a schema, defined as a Perl data structure
  - Data::Sah - Fast and featureful data structure validation
  - ⊕ Notes for Data::Sah
    - It's See Also contains a long list of validators
  - Data::Sah::Coerce - Coercion rules for Data::Sah
  - Data::Sah::CoerceCommon - Common stuffs for Data::Sah::Coerce and Data::Sah::CoerceJS
  - Data::Sah::CoerceJS - Generate coercer code
  - Data::Sah::Tiny - Validate Sah schemas with as little code as possibl
  - Data::Transmute - Transmute (transform) data structure using rules data
  - Data::Validate - Common data validation methods
  - Data::Validate::Domain - Domain and host name validation
  - Data::Validate::IP - IPv4 and IPv6 validation methods
  - Data::Validate::Sanctions - Validate a name against sanctions lists
  - Data::Verifier - Profile based data verification with Moose type constraints
  - Devel::CallChecker - Custom op checking attached to subroutines
  - ⊕ Notes for Devel::CallChecker
    - But see Devel::CallParser
  - Devel::CallParser - Custom parsing attached to subroutines
  - File::LocalizeNewlines - Localize the newlines for one or more files
  - ⊕ Notes for File::LocalizeNewlines
    - See also PerlIO::eol
  - Flat::Profile - Streaming-first profiling for CSV/TSV flat files
  - Flat::Schema - Deterministic schema contracts for flat files
  - Func::Util - Functional programming utilities with XS/OP acceleration
  - Getargs::Long - Named subroutine arguments, with optional type checking
  - Getargs::Mixed - Perl extension allowing subs to handle mixed parameter lists
  - Getopt::GetArgs - Perl module to allow enhanced argument passing, including passing of case-insensitive named arguments as well as positioned arguments
  - HTML::Template::Associate::FormValidator - HTML::Template::Associate Data::FormValidator plugin
  - Identifier::PL::PESEL - Validator for polish PESEL number
  - kura - Store constraints for Data::Checks, Type::Tiny, Moose and more
  - Kwalify - Kwalify schema for data structures
  - Method::Signatures - Method and function declarations with signatures and no source filter
  - Method::Signatures::Simple - Basic method declarations with signatures, without source filters
  - Mo::utils - Mo utilities
  - ⊕ Notes for Mo::utils
    - Contains 19 methods for checking data properties
  - Mo::utils::Array - Mo array utilities
  - Mo::utils::CEFACT - Mo UN/CEFACT Common Code utilities
  - Mo::utils::CSS - Mo CSS utilities
  - Mo::utils::Hash - Mo hash utilities
  - Mo::utils::Language - Mo language utilities
  - Mo::utils::Number - Mo number utilities
  - Mo::utils::URI - Mo utilities for URIs
  - MooseX::Method::Signatures - Method declarations with type constraints and no source filter - deprecated
  - Mouse::Util::TypeConstraints - Type constraint system for Mouse
  - Number::ZipCode::JP - Validate Japanese zip-codes
  - OMOP::CSV::Validator - Validates OMOP CDM CSV files against their expected data types
  - Params::Check - A generic input parsing/checking mechanism
  - Params::Filter - Secure field filtering for parameter construction
  - ⊕ Notes for Params::Filter
    - Checks for presence or absence, but does not validate
  - Params::Get - Get the parameters to a subroutine in any way you want
  - Params::Sah - Validate method/function parameters using Sah schemas
  - Params::Signature - Support for parameter validation using subroutine signature, type declaration, default values, optional parameters
  - Params::Smart - Use both positional and named arguments in a subroutine - Deprecated
  - Params::SomeUtil - Simple, compact and correct param-checking functions
  - Params::Validate - Validate method/function parameters
  - Params::Validate::Strict - Validates a set of parameters against a schema
  - ⊕ Notes for Params::Validate::Strict
    - Note: Silently skips type checks for undef values
  - Params::ValidationCompiler - Build an optimized subroutine parameter validator once, use it forever
  - ⊕ Notes for Params::ValidationCompiler
    - Recommended by Dave Rolsky
  - Parse::Method::Signatures - Perl6 like method signature parser
  - PerlIO::eol - PerlIO layer for normalizing line endings
  - ⊕ Notes for PerlIO::eol
    - See also File::LocalizeNewlines
  - Poz - A simple, composable, and extensible data validation library for Perl
  - Return::Set - Return a value optionally validated against a strict schema
  - Sah - Schema for data structures (specification)
  - Sah::FAQ - Frequently asked questions
  - Sah::Schemas::DefHash - Sah schemas for DefHash
  - Sah::Schema::identifier - A string that starts with [A-Za-z_] followed by zero of more [A-Za-z0-9_]
  - ⊕ Notes for Sah::Schema::identifier
    - Contains many sub-modules
  - Sah::SchemaBundle::CrockfordBase32 - Sah schemas related to Crockford's Base 32 encoding
  - Sah::SchemaBundle::KDEActivity - Sah schemas related to KDE activities
  - Sah::Type - Standard types
  - Scalar::Util - A selection of general-utility scalar subroutines
  - ⊕ Notes for Scalar::Util
    - This module contains a dozen subroutines
  - Signature::Attribute::Checked - Apply value constraint checks to subroutine parameters
  - Smart::Args - Argument validation for you
  - String::Ident - Clean up strings for use as identifiers and in URLs
  - Sub::NamedParams - Perl extension for using named arguments with any sub
  - Valiant - Object validation inspired by Ruby on Rails and more
  - Validate::Simple - (Relatively) Simple way to validate input parameters
  - Validate::Tiny - Minimalistic data validation
- DatesAndTimes
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - http://datetime.perl.org/
    - (2021-11-11) deprecates Date::Manip
    - For Global dates and times
    - For Date and Time Format
    - https://www.w3.org/TR/xmlschema-2/#dateTime
    - https://www.kcaran.com/posts/utc-local-date-conversion-in-perl-with-time-piece.html
    - https://www.tondering.dk/claus/calendar.html
  - App::Greple::ical - Module to support Apple macOS Calendar data
  - Algorithm::Time::ToNumber - Convert time to a number
  - App::SpreadRevolutionaryDate - Spread date and time from Revolutionary (Republican) Calendar on Bluesky, Twitter, Mastodon, Freenode and Liberachat.
  - App::week - Colorful calendar command for ANSI terminal
  - Calendar::Simple - Perl extension to create simple calendars
  - ⊕ Notes for Calendar::Simple
    - Uses DateTime if installed
  - Date - Extremely fast Date framework with timezones, microseconds, relative dates and intervals support
  - Date::Age - Return an age or age range from date(s)
  - Date::Calc - Gregorian calendar date calculations
  - Date::Calendar - Calendar objects for different holiday schemes
  - Date::Cmp - Compare two dates with approximate parsing support
  - Date::Extract - Extract probable dates from strings
  - Date::Find - Find year, month, day from (filename) strings
  - Date::Holidays - Date::Holidays::* adapter and aggregator for all your holiday needs
  - Date::Holidays::Abstract - Abstract class for Date::Holidays::* packages
  - ⊕ Notes for Date::Holidays::Abstract
    - See also Date::Holidays::Super
  - Date::Holidays::Adapter - An adapter class for Date::Holidays::* modules
  - Date::Holidays::AU - Determine Australian Public Holidays
  - Date::Holidays::BY - Determine public holidays and business days in Belarus
  - Date::Holidays::DE - Determine German holidays
  - Date::Holidays::DK - Determine Danish public holidays
  - Date::Holidays::FR - Determine French holidays
  - Date::Holidays::GB - Determine British holidays - Current UK public and bank holiday dates up to 2028
  - Date::Holidays::PT - Determine Portuguese public holidays
  - Date::Holidays::Super - A SUPER class for the Date::Holidays::* modules
  - ⊕ Notes for Date::Holidays::Super
    - See also Date::Holidays::Abstract
  - Date::Holidays::TW - Determine whether it is Taiwan Holidays or not
  - Date::Holidays::UK - Determine UK Public Holidays
  - Date::Holidays::US - Date::Holidays Adapter for US Federal holidays
  - Date::Holidays::USExtended - Provides an extended set of United States holidays
  - Date::Interval - Handling of temporal intervals based on Date::Manip
  - Date::Japanese::Era - Conversion between Japanese Era / Gregorian calendar
  - Date::Japanese::Holiday - Calculate Japanese Holiday
  - Date::Manip - Date manipulation routines
  - Date::ManipX::Almanac - Add almanac date/time functionality (sunrise, etc.) to Date::Manip
  - Date::Parse - Parse date strings into time values
  - Date::Parse::Modern - Provide string to unixtime conversions
  - Date::RangeParser::EN - Parser for plain English date/time range strings
  - ⊕ Notes for Date::RangeParser::EN
    - Extremely flexible
  - Date::Tolkien::Shire - Convert dates into the Shire Calendar
  - Date::Tolkien::Shire::Data - Data functionality for Shire calendars
  - Date::Utility - A class that represents a datetime in various formats
  - ⊕ Notes for Date::Utility
    - Has a huge number of methods
  - DateTime - A date and time object for Perl
  - DateTime::Calendar::Christian - Dates in the Christian calendar
  - DateTime::Calendar::Japanese::Era - DateTime Extension for Japanese Eras
  - DateTime::Calendar::Julian - Dates in the Julian calendar
  - DateTime::Event::Jewish::Sunrise - Calculate halachically interesting times
  - DateTime::Event::Sunrise - Perl DateTime extension for computing the sunrise/sunset on a given day
  - DateTime::Fiction::JRRTolkien::Shire - DateTime implementation of the Shire calendar
  - DateTime::Format::Builder - Create DateTime parser classes and objects
  - DateTime::Format::DateManip - Perl DateTime extension to convert Date::Manip dates and durations to DateTimes and vice versa
  - DateTime::Format::DB2 - Parse and format DB2 dates and times
  - DateTime::Format::Duration - Format and parse DateTime::Durations
  - DateTime::Format::Flexible - Flexibly parse strings and turn them into DateTime objects
  - DateTime::Format::ICal - Parse and format iCal datetime and duration strings
  - DateTime::Format::Intl - A Web Intl.DateTimeFormat Class Implementation
  - ⊕ Notes for DateTime::Format::Intl
    - This is a big module with a huge range of features
  - DateTime::Format::ISO8601 - Parses ISO8601 formats
  - DateTime::Format::JP - Japanese DateTime Parser and Formatter
  - DateTime::Format::Lite - Parse and format datetimes with strptime patterns, returning DateTime::Lite objects
  - DateTime::Format::Mail - Convert between DateTime and RFC2822/822 formats
  - ⊕ Notes for DateTime::Format::Mail
    - See TheRFCGuide for rfc2822
  - DateTime::Format::MySQL - Parse and format MySQL dates and times
  - DateTime::Format::Natural - Parse informal natural language date/time strings
  - ⊕ Notes for DateTime::Format::Natural
    - Note: This package contains various modules, including DateTime::Format::Natural::Lang::EN, which provides the English specific grammar and variables
  - DateTime::Format::DateParse - Parses Date::Parse compatible formats
  - DateTime::Format::RelativeTime - A Web Intl.RelativeTimeFormat Class Implementation
  - DateTime::Format::Strptime - Parse and format strp and strf time patterns
  - ⊕ Notes for DateTime::Format::Strptime
    - But see DateTime::Format::Lite
  - DateTime::Format::Text - Find a Date in Text
  - DateTime::Format::Unicode - Unicode CLDR Formatter for DateTime
  - DateTime::Format::W3CDTF - Parse and format W3CDTF datetime strings
  - DateTime::HiRes - Create DateTime objects with sub-second current time resolution
  - DateTime::Lite - Lightweight, low-dependency drop-in replacement for DateTime
  - DateTime::Locale - Localization support for DateTime.pm
  - DateTime::Locale::FromCLDR - DateTime Localised Data from Unicode CLDR
  - DateTime::Ordinal - The great new DateTime::Ordinal!
  - DateTime::Schedule - Determine scheduled days in range based on exclusions
  - DateTime::Set - Datetime sets and set math
  - DateTime::SpanSet - Set of DateTime spans
  - DateTime::TimeZone - Time zone object base class and factory
  - ⊕ Notes for DateTime::TimeZone
    - Normally use via DateTime above
  - DateTime::Tiny - A date object, with as little code as possible
  - DateTimeX::Easy - Parse a date/time string using the best method available
  - DateTimeX::Format::Ago - I should have written this module "3 years ago"
  - Email::Date - Find and Format Date Headers
  - Email::Date::Format - Produce RFC 2822 date strings
  - ⊕ Notes for Email::Date::Format
    - See TheRFCGuide for rfc2282
  - HTML::CalendarMonth - Generate and manipulate HTML calendar months
  - HTML::CalendarMonthSimple - Perl Module for Generating HTML Calendars
  - ⊕ Notes for HTML::CalendarMonthSimple
    - But use the previous module
  - HTTP::Date - Date conversion routines
  - Month::Simple - Simple month-based date arithmetic
  - Net::CalDAVTalk - Module to talk CalDAV and give a JSON interface to the data
  - Net::CardDAVTalk - A library for talking to CardDAV servers
  - Oxford::Calendar - University of Oxford calendar conversion routines
  - POSIX::RT::Signal - POSIX Real-time signal handling functions
  - POSIX::RT::Timer - POSIX real-time timers
  - ⊕ Notes for POSIX::RT::Timer
    - Contains POSIX::RT::Clock
  - SIRTX::Datecode - Module for interacting with SIRTX Datecodes
  - Text::JSCalendar - Convert between iCalendar * JSCalendar
  - Text::JSContact - Bidirectional vCard <=> JSContact conversion
  - Time::AutoRes - Use Time::HiRes or fall back to core code
  - TimeDate - Date formating subroutines
  - Time::Duration - Rounded or exact English expression of durations. Built-in
  - Time::Duration::LocaleObject - Time duration string in language chosen by an object
  - Time::Duration::Object - Time::Duration, but an object
  - Time::Duration::Parse - Parse string that represents time duration
  - Time::Duration::Parse::More - Parse natural language time duration expressions
  - Time::Elapsed - This module transforms the elapsed seconds into a human readable string
  - Time::HiRes - High resolution alarm, sleep, gettimeofday, interval timers
  - Time::HiRes::Sleep::Until - Provides common ways to sleep until...
  - Time::HiRes::Value - Represent a time value or interval in exact microseconds
  - Time::JulianDay - Julian calendar manipulations
  - Time::Left - Object model for time limits
  - Time::Local - Efficiently compute time from local and GMT time
  - Time::Moment - Represents a date and time of day with an offset from UTC
  - Time::Nanos - Nanosecond time resolution via clock_gettime()
  - Time::OlsonTZ::Data - Olson timezone data
  - Time::ParseDate - Date parsing both relative and absolute
  - Time::Piece - Object Oriented time objects. Built-in
  - ⊕ Notes for Time::Piece
    - Includes Time::Seconds
  - Time::Precise - Extending standard time related functions to always include nanoseconds and always use full year
  - Time::Spec - A wrapper around struct timespec
  - Time::Str - Parse and format date/time strings in multiple standard formats
  - Time::TAI64 - Perl extension for converting TAI64 strings into standard unix timestamps
  - TimeZone::TimeZoneDB - Interface to https://timezonedb.com for looking up Timezone data
  - Vigil::Calendar - Provides a way to describe a calendar _month so that you can easily build HTML calendars or populate your flavour of web calendar
- DebianOS
  - ⊕ See also
    - [Topic]
    - My home page http://savage.net.au/index.html for the Debian.Wiki
  - Container::Builder - Build Container archives
  - Dpkg - Module with core variables
  - DPKG::Packages::Parser - Parses the Debian Packages file
- DebuggingStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Carp::Always - Warns and dies noisily with stack backtraces
  - Carp::Object - https://metacpan.org/pod/Carp::Object
  - Data::Dump - Can be used by Struct::Dumb. See DataTypes
  - ⊕ Notes for Data::Dump
    - See also Data::Pretty
  - Data::Dump::Color - Like Data::Dump, but with color
  - Data::Dump::HTML::Collapsible - Dump Perl data structures as HTML document with collapsible sections
  - Data::Dump::Partial - Dump data structure compactly and potentially partially
  - Data::Dumper - Stringified perl data structures, suitable for both printing and eval
  - ⊕ Notes for Data::Dumper
    - See Data::TreeDumper, Tree::Simple::View & the latter's See Also
  - Data::Dumper::Compact - Vertically compact width-limited data formatter
  - Data::Dumper::Concise - Less indentation and newlines plus sub deparsing
  - Data::Dumper::Interp - Interpolate Data::Dumper output into strings for human consumption
  - Data::Dumper::Simple - Easily dump variables with names
  - Data::Printer - Colored & full-featured pretty print of Perl data structures and objects
  - Debug::CodeBlock - Add DEBUG codeblocks to your code
  - Debug::Comments - Source filter which turns comments into log messages
  - Debug::Easy - A Handy Debugging Module With Colorized Output and Formatting
  - Debug::Filter::PrintExpr - Convert comment lines to debug print statements
  - Devel::Assert - Assertions for Perl >= 5.14
  - ⊕ Notes for Devel::Assert
    - See also assertions
  - Devel::Bug - Transparent inline debugging probe (pure Perl)
  - Devel::EndStats - Display run time and dependencies after running code
  - Devel::MAT::Dumper - Write a heap dump file for later analysis
  - Devel::OverloadInfo - Introspect overloaded operators
  - Devel::ptkdb - Perl debugger using a Tk GUI
  - Devel::REPL - A modern perl interactive shell
  - ⊕ Notes for Devel::REPL
    - Unfortunately, I (author of Runtime::Debugger) did not find a way to get the lexical variables in a scope
    - See also Shell::Perl
  - Devel::StackTrace - An object representing a stack trace
  - Devel::StrictMode - Determine whether strict (but slow) tests should be enabled
  - Devel::Trace::Subs - Generate, track, store and print code flow and stack traces
  - Dump::Krumo - Fancy, colorful, human readable dumps of your data
  - Loo - Pure XS data introspector and code deparser with customisable colour output
  - perl - perl5db.pl - The standard perl debugger
  - Reply - Read, eval, print, loop, yay!
  - ⊕ Notes for Reply
    - Same problem as Devel::REPL
  - Runtime::Debugger - Easy to use REPL with existing lexical support and DWIM tab completion
  - Smart::Comments - Comments that do more than just sit there
- DFA
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/Deterministic_finite_automaton
  - App::GUI::Cellgraph - Draw pattern by cellular automata
  - App::GUI::GoLP - A GUI for viewing Life-like cellular automata, in Perl/Prima
  - Data::FSM - Data object for Finite State Machine
  - DFA::Kleene - Kleene's Algorithm for Deterministic Finite Automata
  - DFA::Statemap - This is the SMC (State Machine Compiler) runtime for target language Perl
  - Dict::FSA - This module is a perl wrapper around fsa
  - ⊕ Notes for Dict::FSA
    - See http://www.eti.pg.gda.pl/~jandac/fsa.html
  - FLAT - Formal Language & Automata Toolkit
  - FSA::Engine - A Moose Role to convert an object into a Finite State Machine
  - FSM::Basic - Finite state machine using HASH as state definitions
  - FSA::Rules - Build simple rules-based state machines in Perl
  - Parse::FSM - Deterministic top-down parser based on a Finite State Machine
  - Set::FA - A Set of Discrete Finite Automata
  - ⊕ Notes for Set::FA
    - Contains Set::FA::Element, a single Discrete Finite Automaton
- DistZilla
  - ⊕ See also
    - [Topic]
  - Dist::Zilla - Distribution builder; installer not included!
  - Dist::Zilla::Plugin::GatherDir::Template - Gather all the files in a directory and use them as templates
  - Dist::Zilla::Plugin::GenerateFile - Build a custom file from only the plugin configuration
  - Dist::Zilla::Plugin::GenerateFile::FromShareDir - Create files in the repository or build, using a sharedir template
  - Dist::Zilla::Plugin::GitHub::CreateRelease - Create a GitHub Release
  - Dist::Zilla::Plugin::ShareDir - Install a directory's contents as "ShareDir" content
- DnsStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://c-ares.org/
    - For DNS Robot: 53 free online DNS and network tools
    - https://publicsuffix.org/list/public_suffix_list.dat
  - Alien::cares - Find or build the c-ares async DNS resolver library
  - AnyEvent::DNS::EtcHosts - Use /etc/hosts before DNS
  - App::sdseasydyn - EasyDNS DDNS updater (CLI-first App distribution)
  - App::sslmaker - Be your own SSL certificate authority
  - Data::DNS - An interface to the DNS root zone database
  - DNS::Robot - Perl client for the DNS Robot API (dnsrobot.net)
  - EV::cares - High-performance async DNS resolver using c-ares and EV
  - Net::DNS - Perl Interface to the Domain Name System
  - Net::DNS::Native - Non-blocking system DNS resolver
  - Net::DNS::Paranoid - Paranoid dns resolver
  - ⊕ Notes for Net::DNS::Paranoid
    - Can use with Furl::HTTP
    - If using LWP, should wrap Net::DNS::Paranoid module with LWPx::ParanoidHandler
  - Net::DNS::Resolver::Unbound - Net::DNS resolver based on libunbound
  - Net::DNS::SEC - DNSSEC extensions to Net::DNS
  - Net::Domain - Attempt to evaluate the current host's internet name and domain
  - Net::Domain::Parts - Extract sub-domain, domain and TLD parts of a domain name.
  - ⊕ Notes for Net::Domain::Parts
    - Meaning 'www.perlmonks.org' => Domain: perlmonks.org, Subdomain: www, TLD: org
  - Net::Domain::TLD - Work with TLD names
  - Net::IDN::Encode - Internationalizing Domain Names in Applications (IDNA)
  - ⊕ Notes for Net::IDN::Encode
    - See TheRFCGuide for rfc3492, rfc5890
    - See also URI in [[HTTPHandling]]
  - Net::IDN::PP - A pure-Perl implementation of the Punycode algorithm for encoding internationalized domain names (IDNs)
  - Net::PublicSuffixList - The Mozilla Public Suffix List
  - Net::SSLeay - Perl bindings for OpenSSL and LibreSSL
  - OpenDNS::MyIP - Get your public IP address
  - WWW::DNSMadeEasy - Accessing DNSMadeEasy API
  - Zonemaster::Backend - A system for running Zonemaster tests asynchronously through an RPC-API
  - Zonemaster::CLI - Run Zonemaster tests from the command line
  - Zonemaster::Engine - A tool to check the quality of a DNS zone
  - Zonemaster::LDNS - Perl wrapper for the ldns DNS library
- EBookHandling
  - ⊕ See also
    - [Topic]
  - App::EbookUtils - Command-line utilities related to ebooks
  - Chandra::EPUB - Epub reader built with Perl and Chandra
  - EBook::Gutenberg - Fetch ebooks from Project Gutenberg
  - EBook::Ishmael - Convert ebook documents to plain text
  - ⊕ Notes for EBook::Ishmael
    - Formats supported
  - FB3::Convert - Scripts and API for converting FB3 from and to different formats
- EmailStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - JMAP rather than IMAP: https://jmap.io/
    - EAV::XS (Address validation)
    - For Email::* & Mail::*
  - App::mailmake - App harness for the mailmake CLI
  - ⊕ Notes for App::mailmake
    - See Mail::Make below
  - App::Milter::Limit - Sendmail Milter that limits message rate by sender
  - App::Milter::Limit::Plugin::BerkeleyDB - BerkeleyDB driver for App::Milter::Limit
  - App::Milter::Limit::Plugin::SQLite - SQLite driver for App::Milter::Limit
  - App::wsgetmail - Fetch mail from the cloud using webservices
  - Data::JSEmail - Convert between Email::MIME and the JSON format from RFC 8621 (JMAP Mail)
  - Email::Abstract - Unified interface to mail representations
  - Email::Abuse::Investigator - Analyse spam email to identify originating hosts, hosted URLs, and suspicious domains
  - Email::Address - RFC 2822 Address Parsing and Creation
  - Email::Address::List - RFC close address list parsing
  - Email::Mailer - Multi-purpose emailer for HTML, auto-text, attachments, and templates
  - ⊕ Notes for Email::Mailer
    - Modelled on Email::Simple
    - Looks good
  - Email::MIME - Easy MIME message handling
  - Encode::MIME::Header - MIME encoding for an unstructured email header
  - Email::Send::YYClouds - Send simple mail using smtp relay server
  - Email::Sender - A library for sending email
  - ⊕ Notes for Email::Sender
    - This module has a huge list of contributors
  - Email::Sender::Transport::Mailgun - Mailgun transport for Email::Sender
  - Email::Sender::Transport::SMTP - Send email over SMTP
  - ⊕ Notes for Email::Sender::Transport::SMTP
    - Replaces Email::Sender::Transport::SMTPS
  - Email::Sender::Transport::SMTP::Persistent - An SMTP client that stays online
  - ⊕ Notes for Email::Sender::Transport::SMTP::Persistent
    - The stock Email::Sender::Transport::SMTP reconnects each time it sends a message. This transport only reconnects when the existing connection fails
  - Email::Simple - Simple parsing of RFC2822 message format and headers
  - ⊕ Notes for Email::Simple
    - See TheRFCGuide for rfc2822
  - Email::Stuffer - A more casual approach to creating and sending Email:: emails
  - Email::Valid - Check validity of Internet email addresses
  - Encode::IMAPUTF7 - Modification of UTF-7 encoding for IMAP
  - Exim - Supercedes sendmail, under Linux at least
  - MailTools - Bundle of ancient email modules
  - ⊕ Notes for MailTools
    - Includes Mail::Internet
    - If you start writing a new application, you should use the Mail::Box distribution, which has more features and handles messages much better according to the RFCs
  - Mail::AuthenticationResults - Object Oriented Authentication-Results Headers
  - Mail::BIMI - Brand Indicators for Message Identification (BIMI) retrieval, validation, and processing
  - Mail::Box - Manage a mailbox, a folder with messages
  - Mail::Box::IMAP4 - Handle IMAP4 folders as client
  - Mail::Box::Parser::C - Parsing folders for MailBox with C routines
  - Mail::Box::Parser::Perl - Reading messages from file using Perl
  - Mail::Box::POP3 - Handle POP3 folders as client
  - Mail::DKIM::Iterator - Iterative DKIM validation or signing
  - Mail::DMARC - Perl implementation of DMARC
  - Mail::DMARC::PurePerl - Pure Perl implementation of DMARC
  - Mail::DWIM - Do-What-I-Mean Mailer
  - Mail::Exim::ACL::Geolocation - Map IP addresses to location information
  - Mail::IMAPClient - An IMAP Client API
  - Mail::IMAPTalk - IMAP client interface with lots of features
  - Mail::Make - Strict, Fluent MIME Email Builder
  - Mail::Message - General message object
  - Mail::Milter::Authentication - A Perl Mail Authentication Milter
  - Mail::POP3Client - Perl 5 module to talk to a POP3 (RFC1939) server
  - ⊕ Notes for Mail::POP3Client
    - See TheRFCGuide for rfc1939
  - Mail::Reporter - Base-class and error reporter for Mail::Box
  - Mail::Sendmail - Simple platform independent mailer
  - Mail::SpamAssassin::Plugin::DBSCORE - Spamassassin scores from database
  - Mail::SPF - An object-oriented implementation of Sender Policy Framework
  - Mail::Transport - Use Mail Transfer Agents (MTAs)
  - MailboxValidator::SingleValidation - Email verification module for Perl using MailboxValidator API
  - MIME::Base32 - Base32 encoder and decoder
  - MIME::Base32::XS - Encoding and decoding Base32
  - MIME::Base64 - Encoding and decoding of base64 strings
  - ⊕ Notes for MIME::Base64
    - http://en.wikipedia.org/wiki/Base64#URL_applications
  - MIME::Charset - Charset Information for MIME
  - MIME::EncWords - Deal with RFC 2047 encoded words (improved)
  - ⊕ Notes for MIME::EncWords
    - See TheRFCGuide for rfc2047
  - MIME::Entity - Class for parsed-and-decoded MIME message
  - ⊕ Notes for MIME::Entity
    - Before reading further, you should see MIME::Tools to make sure that you understand where this module fits into the grand scheme of things
  - MIME::Lite - Low-calorie MIME generator
  - ⊕ Notes for MIME::Lite
    - There are a number of alternatives, like Email::MIME or MIME::Entity and Email::Sender, which you should probably use instead
    - Actually, just start with Mail::Box
  - MIME::Mini - Minimal code to parse/create mbox files and mail messages
  - MIME::QuotedPrint - Encoding and decoding of quoted-printable strings
  - MIME-tools - Modules for parsing (and creating!) MIME entities
  - ⊕ Notes for MIME-tools
    - POD contains 2 important diagrams
  - MIME::Types - Definition of MIME types "MIME Type" is the old name for "Media Type"
  - Net::IMAP::Client - Not so simple IMAP client library
  - Net::SimpleMail - A simple module to send emails via simplemail.co.in
  - Net::MitDK - Perl API for http://mit.dk/
  - ⊕ Notes for Net::MitDK
    - https://metacpan.org/release/KARASIK/Net-MitDK-0.07/source/README.md - For English docs
  - Net::validMX - Use DNS and/or regular expressions to verify if an email address could be valid
  - Qmail::Deliverable - Determine deliverability of local addresses
  - Sendmail::PMilter - Perl binding of Sendmail Milter protocol
  - Sieve::Generator - Generate Sieve email filter scripts
  - Sisimai - Analyze bounce mails
  - WWW::MailboxOrg - Perl client for Mailbox.org API
- EnumStuff
  - ⊕ See also
    - [Topic]
  - Class::Enum - Typed enum
  - Class::Enumeration - Abstract parent class of enum classes
  - Class::Type::Enum - Build Enum-like classes
  - Data::Enum - Immutable enumeration classes
  - MooseX::Enumeration - A native attribute trait for enums
  - MooX::Enumeration - Shortcuts for working with enum attributes in Moo
  - Object::Enum - replacement for if ($foo eq 'bar')
  - Object::PadX::Enum - Syntactic sugar for enum-like singleton-bearing Object::Pad classes
  - Type::Tiny::Enum - String enum type constraints
- EventStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For a good intro to promises
    - https://docs.nats.io/reference/reference-protocols/nats-protocol
    - For the upstream protocol spec
    - https://libuv.org/
    - https://metacpan.org/pod/perlop#I%2FO-Operators
    - https://perl.plover.com/TieFile/why-not-DB_File
    - For Promises/A+
  - Alien::liburing - Alien wrapper for liburing
  - Algorithm::Cron - Abstract implementation of the cron(8) scheduling algorithm
  - Algorithm::RateLimiter::TokenBucket - Loop-agnostic Token Bucket Rate Limiter
  - AnyEvent - The DBI of event loop programming
  - ⊕ Notes for AnyEvent
    - Contains AE, a simpler/faster/newer/cooler AnyEvent API
  - AnyEvent::FTP - Simple asynchronous FTP client and server
  - AnyEvent::Gearman - Asynchronous Gearman client/worker module for AnyEvent applications
  - AnyEvent::Impl::Prima - Prima event loop adapter for AnyEvent
  - AnyEvent::ITM - Debug ITM/SWD stream deserializer for AnyEvent
  - AnyEvent::Net::Curl::Queued - Moo wrapper for queued downloads via Net::Curl & AnyEvent
  - AnyEvent::Promises - Simple implementation of Promises/A+ spec
  - AnyEvent::Util - Various utility functions
  - AnyEvent::XSPromises - Another Promises library, this time implemented in XS for performance
  - AnyEvent::YACurl - Yet Another curl binding for AnyEvent
  - Async::Event::Interval - Scheduled and one-off restartable asynchronous events
  - Conduit - Serve HTTP with Future::IO
  - Devel::Events - Extensible instrumentation framework
  - EV - Perl interface to libev, a high performance full-featured event loop
  - EV::ClickHouse - Async ClickHouse client using EV
  - EV::Etcd - Async etcd v3 client using native gRPC and EV/libev
  - EV::Future - Minimalist and high-performance async control flow for EV
  - EV::Gearman - Asynchronous Gearman client and worker on libev
  - EV::Hiredis - Asynchronous redis client using hiredis and EV
  - ⊕ Notes for EV::Hiredis
    - See also EV::Redis below
  - EV::Kafka - High-performance asynchronous Kafka/Redpanda client using EV
  - EV::MariaDB - Async MariaDB/MySQL client using libmariadb and EV
  - EV::Memcached - High-performance asynchronous memcached client using EV
  - EV::Nats - High-performance asynchronous NATS client using EV
  - EV::Pg - Asynchronous PostgreSQL client using libpq and EV
  - EV::Redis - Asynchronous redis client using hiredis and EV
  - ⊕ Notes for EV::Redis
    - Fork of EV::Hiredis
  - EV::Websockets - WebSocket client/server using libwebsockets and EV
  - Event::RPC - Event based transparent Client/Server RPC framework
  - Feersum - A PSGI engine for Perl based on EV/libev
  - Future - Represent an operation awaiting completion
  - Future::AsyncAwait - Deferred subroutine syntax for futures
  - Future::Batch - Process multiple Future-returning operations with concurrency control
  - Future::Batch::XS - XS implementation of batch processing for Future operations
  - Future::IO - Future-returning IO methods
  - Future::IO::Impl::Glib - Implement Future::IO using Glib
  - Future::IO::Impl::KQueue - Implement Future::IO using kqueue(2)
  - Future::IO::Impl::Ppoll - Implement Future::IO using ppoll(2)
  - Future::IO::Impl::Tickit - Implement Future::IO with Tickit
  - Future::IO::Impl::Uring - A Future::IO implementation for IO::Uring
  - Future::IO::Impl::UV - Implement Future::IO using UV
  - Future::IO::Resolver - Name resolver methods for Future::IO
  - Future::IO::TLS - A TLS interface for Future::IO
  - Future::Queue - A FIFO queue of values that uses Futures
  - Future::Selector - Manage a collection of pending futures
  - Future::Uring - Future-returning io_uring functions
  - Future::Utils - Utility functions for working with Future objects
  - Future::XS - Experimental XS implementation of Future
  - IO - Object-style access to files, pipes, etc
  - IO::All - IO::All to Larry Wall!
  - ⊕ Notes for IO::All
    - The Swiss Army knife of file ops
  - IO::AIO - Asynchronous/Advanced Input/Output
  - IO::AIO::LoadLimited - A tiny IO::AIO extension that allows to load multiple files
  - IO::AIO::Util - Useful functions missing from IO::AIO
  - IO::Any - Open anything
  - IO::Async - Asynchronous event-driven programming
  - ⊕ Notes for IO::Async
    - This module has an interesting list of modules in See Also
  - IO::Async::Handle - Event callbacks for a non-blocking file descriptor
  - IO::Async::Loop - Core loop of the IO::Async framework
  - IO::Async::Loop::Epoll - Use IO::Async with epoll on Linux
  - IO::Async::Loop::Epoll::FD - Use IO::Async with Epoll and special filehandles
  - IO::Async::Loop::EV - Use IO::Async with EV
  - IO::Async::Loop::FutureIO - Use IO::Async with Future::IO
  - IO::Async::Loop::Poll - Use IO::Async with poll(2)
  - IO::Async::Loop::Ppoll - Use IO::Async with ppoll(2)
  - IO::Async::Loop::Uring - Use IO::Async with IO::Uring
  - IO::Async::Notifier - Base class for IO::Async event objects
  - IO::Async::Process - Start and manage a child process
  - IO::Async::SSL - Use SSL/TLS with IO::Async
  - IO::Async::Stream - Event callbacks and write buffering for a stream filehandle
  - IO::Async::Timer - Base class for Notifiers that use timed delays
  - IO::Async::Timer::Periodic - Event callback at regular intervals
  - IO::AsyncX::Sendfile - Adds support for Sys::Sendfile to IO::Async::Stream
  - IO::Barf - Barfing content to output file
  - IO::Dir - Supply object methods for directory handles
  - IO::FD - Faster accept, socket, listen with file descriptors, not handles
  - IO::File - Supply object methods for filehandles
  - IO::Handle - Supply object methods for I/O handles
  - IO::Interactive - Utilities for interactive I/O
  - IO::KQueue - Perl interface to the BSD kqueue system call
  - IO::Pipe - Supply object methods for pipes
  - IO::Poll - Object interface to system poll call
  - IO::Ppoll - Object interface to Linux's ppoll() call
  - IO::Seekable - Supply seek based methods for I/O objects
  - IO::Select - OO interface to the select system call
  - IO::Select::SSL - IO::Socket::SSL compatible IO::Select
  - IO::Socket - Object interface to socket communications
  - IO::Socket::INET - Object interface for AF_INET domain sockets
  - IO::Socket::INET6 - Object interface for AF_INET/AF_INET6 domain sockets - Deprecated
  - ⊕ Notes for IO::Socket::INET6
    - Use IO::Socket::IP instead
  - IO::Socket::IP - Family-neutral IP socket supporting both IPv4 and IPv6
  - IO::Socket::Multicast - Send and receive multicast messages
  - IO::Socket::SSL - SSL sockets with IO::Socket interface
  - IO::Socket::Socks - Provides a way to create socks client or server both 4 and 5 version
  - IO::Socket::Socks::Wrapped - Object wrapped by IO::Socket::Socks::Wrapper
  - IO::Socket::Socks::Wrapper - Add SOCKS support for any perl object / package / program
  - IO::Socket::SSL - SSL sockets with IO::Socket interface
  - ⊕ Notes for IO::Socket::SSL
    - Has lots of docs and sample code
  - IO::Trace - Log I/O of an arbitrary process
  - IO::Uring - io_uring for Perl
  - libev - http://software.schmorp.de/pkg/libev.html
  - Math::Ryu - Perl interface to Ryu (sane NV-to-string conversion)
  - Net::LibAsyncNS - A Perl wrapper around libasyncns
  - Promise::AsyncAwait - Async/await with promises
  - Promise::ES6 - ES6-style promises in Perl
  - Promise::Me - Fork Based Promise with Asynchronous Execution, Async, Await and Shared Data
  - Promise::XS - Fast promises in Perl
  - Promises - An implementation of Promises in Perl
  - Riemann::Client - A Perl client for the Riemann event system
  - ⊕ Notes for Riemann::Client
    - http://riemann.io/
  - Ryu - Asynchronous stream building blocks
  - Ryu::Async - Use Ryu with IO::Async
  - Signal::Mask - Signal masks made easy
  - Socket - Networking constants and support functions
  - Socket6 - IPv6 related part of the C socket.h defines and structure manipulators
  - Socket::More - List network interfaces and scope passive sockets to them
  - Sys::SigAction - Perl extension for Consistent Signal Handling
  - Syntax::Keyword::Defer - Execute code when leaving a block
  - Time::DoAfter - Wait before doing by label controller singleton
  - Timer::Wheel - Lightweight timer/event scheduler
  - UV - Perl interface to libuv
- ExceptionHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://phoenixtrap.com/2021/12/07/sweeter-perl-exception-classes/
    - https://gist.github.com/Ovid/5205534f7dcc52e4d931aaff301b39aa
  - Aion::Carp - Adds stack trace to exceptions
  - Aspect::Guard - General purpose guard object for destroy-time actions
  - autodie::Scope::Guard - Wrapper class for calling subs at end of scope
  - Capture::Tiny - Capture STDOUT and STDERR from Perl, XS or external programs
  - ⊕ Notes for Capture::Tiny
    - In core, so 1st choice
    - This module has a huge See Also list
  - Class::Throwable - A minimal lightweight exception class
  - Clean::Eval - Run code under eval without leaking $@ and get a rich error object back on failure
  - Errno::AnyString - Put arbitrary strings in $!
  - Error - Error/exception handling in an OO-ish way
  - Error::Pure - Perl module for structured errors
  - ⊕ Notes for Error::Pure
    - See Task::Error::Pure below
  - Error::Pure::Output::Bio - Output bioperl subroutines for Error::Pure
  - Error::Show - Locate and Diagnose Errors/Exceptions in Perl programs
  - Exception::Base - Lightweight exceptions
  - ⊕ Notes for Exception::Base
    - Has a great See Also
  - Exception::Class - A module that allows you to declare real exception classes in Perl
  - ⊕ Notes for Exception::Class
    - But see Throwable & HTTP::Throwable
  - Exception::Died - Convert simple die into real exception object
  - Exception::Reporter - A generic exception-reporting object
  - Exception::Reporter::Summarizer::PlackRequest - A summarizer for Plack::Request objects
  - Exception::Sink - General purpose compact exception handling
  - Exception::System - The exception class for system or library calls
  - Exception::ThrowUnless - It provides functions much like the standard perl functions, except that if they fail, they will die instead of returning undef
  - Exception::Warning - Convert simple warn into real exception object
  - ExclusiveLock::Guard - Lexically-scoped lock management
  - Glitch - Exception Handling
  - Guard - Safe cleanup blocks
  - Guard::Stats - Create guard objects and gather averall usage statistics from them
  - Guard::Timer - A scope guard that keeps time
  - Hook::LexWrap - Lexically scoped subroutine wrappers
  - Hook::Output::File - Redirect STDOUT/STDERR to a file
  - Hook::Output::Tiny - Easily enable/disable trapping of STDOUT/STDERR
  - Hook::Scope - Perl extension for adding hooks for exiting a scope
  - HTTP::Exception - Throw HTTP-Errors as (Exception::Class-) Exceptions
  - HTTP::Throwable - A set of strongly-typed, PSGI-friendly HTTP 1.1 exception libraries
  - ⊕ Notes for HTTP::Throwable
    - Build on top of Throwable
  - Ouch - Exceptions that don't hurt
  - Perl::Syntax - Syntax Check Perl files and strings
  - ⊕ Notes for Perl::Syntax
    - However it doesn't show any errors by design (only interested in process return code)
  - Proc::Guard - Process runner with RAII (Resource acquisition is initialization) pattern
  - Scope::Guard - Lexically-scoped resource management
  - Sub::Prepend - Prepend code to named subroutines
  - Sub::ScopeFinalizer - Execute code on exiting scope
  - Syntax::Check - Wraps 'perl -c' so it works even if modules are unavailable
  - Task::Error::Pure - Install the Error::Pure modules
  - Throwable - A role for classes that can be thrown
  - Throwable::SugarFactory - Build a library of syntax-sugared Throwable-based exceptions
  - Unexpected - Localised exception classes composed from roles
  - Value::Canary - Callbacks for value destruction
  - X::Tiny - Base class for a bare-bones exception factory
- ExtensibleProvisioningProtocol
  - ⊕ See also
    - [Topic]
  - App::pepper - A command-line EPP client
  - ⊕ Notes for App::pepper
    - Uses Net::EPP
    - See TheRFCGuide for rfc5731, rfc9154
  - Net::EPP - A Perl library for the Extensible Provisioning Protocol (EPP).
  - Net::EPP::Registry::Nominet - A simple client interface to the Nominet EPP service
  - Net::EPP::Server - Provides a high-level framework for developing Extensible Provisioning Protocol (EPP) servers
- FAQ
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://www.defectivebydesign.org
  - What guides are included in this wiki? - TheCharacterGuide
  - ⊕ Notes for What guides are included in this wiki?
    - TheISOGuide
    - TheLanguageGuide
    - TheOSGuide
    - ThePolicyGuide
    - TheRFCGuide
    - TheWindowGuide
  - What do I do about AI in relation to my modules? - The module Safe::Hole includes a file called AI_POLICY.md. Examine that for ideas
  - ⊕ Notes for What do I do about AI in relation to my modules?
    - See also https://www.xda-developers.com/linux-kernel-now-allows-ai-written-code/
    - See also https://wiki.gentoo.org/wiki/Project:Council/AI_policy
  - Why are AI agents so dangerous - The fundamental problem is that AI must compress reality into model-legible forms
  - ⊕ Notes for Why are AI agents so dangerous
    - They don't have to attack the territory; they can attack the map
    - Models lack local contextual knowledge
    - They process symbols, not meaning
    - A human sees a suspicious URL; an AI sees valid syntax
    - And that semantic gap becomes a security gap
    - https://www.schneier.com/crypto-gram/archives/2025/1115.html#cg4
  - Which is the best XML processing module? - There isn't one! But there are different ones for different problems
  - ⊕ Notes for Which is the best XML processing module?
    - Typically, the latter are event-based, not data-based, so they react to things like start tag, end tag, etc
    - It all depends on how you think about your problem, and your specific requirements
  - Where can I learn about Object Oriented Programming (OOP)? - https://metacpan.org/dist/Marlin/view/lib/Marlin/Manual/Beginning.pod
  - Why don't you include Catalyst, Moose, etc? - My time is limited.
  - What is prompt injection - It is semantic mimicry: adversarial instructions that resemble legitimate prompts, which trigger self-compromise
  - Why is prompt injection dangerous - LLMs process token sequences, but no mechanism exists to mark token privileges
  - ⊕ Notes for Why is prompt injection dangerous
    - This might make it unsolvable in today's LLMs
    - https://www.schneier.com/crypto-gram/archives/2025/1115.html#cg4
  - What specifically is the problem with prompt injection - In training, we face poisoned datasets and backdoored models
  - ⊕ Notes for What specifically is the problem with prompt injection
    - During operation, we face a contaminated context and persistent compromise
    - We need semantic integrity: verifying not just data but interpretation, not just content but context, not just information but understanding
    - We can add checksums, signatures, and audit logs
    - But how do you checksum a thought? How do you sign semantics? How do you audit attention?
    - https://www.schneier.com/crypto-gram/archives/2025/1115.html#cg4
- FeaturesAndPragmas
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - PerlDocumentation
  - base - Establish an ISA relationship with base classes at compile time
  - bigfloat - Transparent big floating point number support for Perl
  - bigint - Transparent big integer support for Perl
  - bignum - Transparent big number support for Perl
  - bigrat - Transparent big rational number support for Perl
  - builtins - Install all the new builtins from the builtin namespace
  - criticism - Perl pragma to enforce coding standards and best-practices
  - diagnostics - Perl pragma to produce verbose warning diagnostics
  - ⊕ Notes for diagnostics
    - Likewise, the splain program
  - exact - Perl pseudo pragma to enable strict, warnings, features, mro, filehandle methods
  - exact::class - Simple class interface extension for exact
  - exact::cli - Command-line interface helper utilities extension for exact
  - exact::conf - Cascading merged application configuration extension for exact
  - exact::fun - Functions and methods with parameter lists for exact
  - exact::lib - Compile-time @INC manipulation extension for exact
  - exact::me - Original program path locations extension for exact
  - experimental - Experimental features made easy
  - feature - Perl pragma to enable new features
  - ⊕ Notes for feature
    - See https://metacpan.org/pod/Exception::Base for sample code
  - Full::Pragmata - Common pragmata for Perl scripts and modules
  - ⊕ Notes for Full::Pragmata
    - A must-read document
  - lazy - Lazily install missing Perl modules
  - lexically - Lexically import functions from non-lexical exporters
  - parent - Establish an ISA relationship with base classes at compile time
  - perlhist - The Perl history records
  - perlpolicy - Various and sundry policies and commitments related to the Perl core
  - signatures - Subroutine signatures with no source filter
  - strict - Perl pragma to restrict unsafe constructs
  - strictures - Turn on strict and make most warnings fatal
  - switch - Perl pragma to activate if/given/when (via use feature 'switch';)
  - syntax - Activate syntax extensions
  - Syntax::Feature::Function - Provides a function keyword
  - warnings - Perl pragma to control optional warnings
- FileHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - for jQuery File Upload plugin
    - https://perl.plover.com/TieFile/why-not-DB_File
    - https://metacpan.org/pod/perlop#I%2FO-Operators
  - AnyEvent::Filesys::Notify - An AnyEvent compatible module to monitor files/directories for changes
  - App::BackupPlan - Perl extension for automated, regular backups
  - App::CdUtils - CLI utilities related to changing directories
  - App::CheckPerlReleaseFilename - Check whether filenames look like perl module release archive
  - App::PerlGzipScript - Gzip perl scripts to reduce their file size
  - App::SortCopies - The copy sorter! (What did you expect?)
  - App::DownloadsDirUtils - Utilities related to downloads directories
  - App::DuplicateFilesUtils - CLI utilities related to duplicate files
  - App::FileCleanerByDiskUage - Removes files based on disk space usage till it drops below the specified amount
  - App::FindUtils - Utilities related to finding files
  - App::FilenameKeyValueUtils - CLIs for Filename::KeyValue
  - App::FilenameTimestampUtils - CLIs for Filename::Timestamp
  - App::FilenameTypeUtils - CLIs for Filename::Type::*
  - App::FilenameUtils - CLIs for Filename::*
  - App::perlmv::scriptlet::prefix_with_number - Prefix filenames with number (usually to make them easily sortable)
  - App::renwd - REName current (Working) Directory
  - App::sdif - Contains utility programs cdif, sdif and watchdiff to post-process output of diff
  - App::Sky - Wrapper to rsync/etc. to upload files to a remote server and give download links
  - App::UniqFiles - Report unique/duplicate file {names,contents}
  - AWS::Lambda - Perl support for AWS Lambda Custom Runtime
  - AWS::S3 - Lightweight interface to Amazon S3 (Simple Storage Service)
  - AWS::XRay - AWS X-Ray tracing library
  - Backup::Snapback - Routines for support of rsync-based snapshot backup
  - Cwd::Guard - Temporary changing working directory (chdir)
  - Cwd::utf8 - Fully UTF-8 aware Cwd
  - Env::Path - Advanced operations on path variables
  - Fcntl - Various flag constants and helper functions from C's fcntl.h
  - File::Access::Driver - Convenient File Access with "Batteries included"
  - File::BackupCopy - Create a backup copy of the file
  - File::BaseDir - Use the Freedesktop.org base directory specification
  - File::Basename - Parse file paths into directory, filename and suffix
  - File::Basename::Extra - Extension to File::Basename, adds named access to file parts and handling of filename suffixes
  - File::BOM::Utils - Check, Add and Remove BOMs
  - File::ChangeNotify - Watch for changes to files, cross-platform style
  - File::chdir - A more sensible way to change directories. $CWD and @CWD, which are not global
  - File::ContentStore - A store for file content built with hard links
  - File::Copy - Copy files or filehandles
  - File::Copy::clonefile - Call clonefile system call
  - ⊕ Notes for File::Copy::clonefile
    - MacOS only
  - File::Copy::NoClobber - Rename copied files safely if destination exists
  - ⊕ Notes for File::Copy::NoClobber
    - See also File::Util::Rename below
  - File::DirList - Provide a sorted list of directory content
  - File::FDpasser - A module for passing open file descriptors to and from other scripts or even other programs
  - File::Fetch - A generic file fetching mechanism
  - File::Find - Traverse a directory tree. Built-in
  - ⊕ Notes for File::Find
    - But see File::Find::Rule
  - File::FindRoot - Find the directory that's the root for a project
  - File::FindUniq - Find unique or duplicate file {contents,names}
  - File::Find::Closures - Functions you can use with File::Find
  - File::Find::Mason - Find files that contain Mason components
  - File::Find::Rule - Alternative interface to File::Find
  - ⊕ Notes for File::Find::Rule
    - But see Path::Iterator::Rule below
  - File::Find::utf8 - Fully UTF-8 aware File::Find
  - File::Finder - Nice wrapper for File::Find ala find(1)
  - File::FStore - Module for interacting with file stores
  - File::FStore::Base - Module for interacting with file stores
  - File::FStore::File - Module for interacting with file stores
  - File::Glob - Perl extension for BSD glob routine
  - File::GlobMapper - Extend File Glob to Allow Input and Output Files
  - File::HomeDir - Find your home and other directories on any platform
  - File::Information - Generic module for extracting information from filesystems
  - File::Information::Base - Generic module for extracting information from filesystems
  - File::Information::Filesystem - Generic module for extracting information from filesystems
  - File::Information::Inode - Generic module for extracting information from filesystems
  - File::Listing - Parse a directory listing
  - File::Lockfile::Emacs - Create/check/delete Emacs-style lockfiles
  - File::MimeInfo - Determine file type from the file name
  - File::MimeInfo::Applications - Find programs to open a file by mimetype
  - File::MimeInfo::Simple - Simple implementation to determine file type
  - File::MMagic - Guess file type
  - File::MoreUtil - File-related utilities, about 27 of them actually
  - File::Open::NoCache::ReadOnly - Open a file and flush from memory on closing
  - File::Path - Create or remove directory trees
  - File::Path::Redirect - Poor man's symbolic link path redirection
  - File::Print::Many - Print to more than one file descriptor at once
  - File::Process - Process text files with customer handlers
  - File::pushd - Change directory temporarily for a limited scope
  - File::Raw - Fast IO operations using direct system calls
  - File::Raw::Archive - Archive container reader/writer
  - File::Raw::Base64 - Base64 plugin for File::Raw
  - File::Raw::Gzip - Gzip / zlib / raw deflate plugin for File::Raw
  - File::Raw::Hash - Cryptographic and integrity digests as a File::Raw plugin
  - File::Raw::JSON - JSON / JSONL plugin for File::Raw
  - File::Raw::Separated - CSV/TSV plugin for File::Raw
  - File::ReadBackwards - Read a file backwards by lines
  - File::Rotate::Backup - Make backups of multiple directories and rotate them on unix
  - File::RsyBak - Backup files/directories with histories, using rsync
  - File::Save::Home - Place file safely under user home directory
  - File::ShareDir - Locate per-dist and per-module shared files
  - ⊕ Notes for File::ShareDir
    - But see the next module
  - File::ShareDir::Tarball - Deal transparently with shared files distributed as tarballs
  - File::ShareDir::Tiny - Locate per-dist and per-module shared files
  - ⊕ Notes for File::ShareDir::Tiny
    - For the installation half of the solution, there are several options available that depend on your installation tool. For ExtUtils::MakeMaker there is File::ShareDir::Install. Other tools like Module::Build, Module::Build::Tiny and Dist::Build have built in support for sharedirs
  - File::Slurper - A simple, sane and efficient module to slurp a file
  - ⊕ Notes for File::Slurper
    - And File::Slurp is obsolete
  - File::Slurper::Temp - File::Slurper + File::Temp
  - ⊕ Notes for File::Slurper::Temp
    - And be warned, File::Temp uses global variables. See TestingHelp
  - File::Spec - Portably perform operations on file names
  - File::Spec::Functions - Portably perform operations on file names
  - File::stat - By-name interface to Perl's built-in stat() functions
  - File::stat::Extra - An extension of the File::stat module, provides additional methods.
  - File::StatX - StatX for Perl
  - File::Sticker - Read, Write file meta-data
  - ⊕ Notes for File::Sticker
    - Includes sticker which sticks tags onto files, populates a database with file meta-data
    - See also Data::TagDB in DatabaseAndSQL1
  - File::Store - Module for interacting with file stores
  - File::Stubb - Stub file creator
  - File::Symlink::Relative - Create relative symbolic links
  - File::Temp - Return name and handle of a temporary file safely
  - ⊕ Notes for File::Temp
    - And be warned, File::Temp uses global variables. See TestingHelp
  - File::URIList - Module for reading and writing RFC 2483 URI lists
  - ⊕ Notes for File::URIList
    - See RfcGuide for rfc2483
  - File::Util::Copy - Utilities related to copying files
  - File::Util::Rename - Utilities related to renaming files
  - ⊕ Notes for File::Util::Rename
    - See also File::Copy::NoClobber above
  - File::ValueFile - Module for reading and writing ValueFile files
  - File::Which - Perl implementation of the which utility as an API
  - Filename::Compressed - Check whether filename indicates being compressed
  - Filename::Media::Info - Extract various information from media filenames
  - Filename::Timestamp - Extract date/timestamp from filename, if any
  - Filename::Type::Archive - Check whether filename indicates being an archive file
  - Filename::Type::Audio - Check whether filename indicates being an audio file
  - Filename::Type::Backup - Check whether filename indicates being a backup file
  - Filename::Type::Compressed - Check whether filename indicates being compressed
  - Filename::Type::Ebook - Check whether filename indicates being an e-book
  - Filename::Type::Executable - Check whether filename indicates being an executable program/script
  - Filename::Type::Image - Check whether filename indicates being an image
  - Filename::Type::Perl::Release - Check whether filename looks like a perl module release archive, e.g. a CPAN release tarball
  - Filename::Type::Video - Check whether filename indicates being a video file
  - Filesys::Fuse3 - Write filesystems in Perl using Fuse3
  - ⊕ Notes for Filesys::Fuse3
    - https://libfuse.github.io/doxygen/index.html - For docs for Fuse
  - Filesys::Notify::KQueue - Wrap IO::KQueue for watching file system
  - Filesys::Notify::Simple - Simple and dumb file system watcher
  - Filesys::Notify::Win32::ReadDirectoryChanges - Read/watch directory changes
  - FindApp - Find your application home and config your process for it
  - ⊕ Notes for FindApp
    - Consider this module if you have ever needed
    - use FindBin; use lib "$FindBin::Bin/../lib";
  - Flat::Profile - Streaming-first profiling for CSV/TSV flat files
  - ⊕ Notes for Flat::Profile
    - See [[Acronyms]] for ETL
  - IO::Dir - Supply object methods for directory handles
  - IO::ExplicitHandle - Force I/O handles to be explicitly specified
  - IO::FDPass - Pass a file descriptor over a socket
  - IO::File - Supply object methods for filehandles
  - IO::Handle - Supply object methods for I/O handles
  - IO::Seekable - Supply seek based methods for I/O objects
  - IO::SendFile - Perl extension that implements the sendfile() interface
  - IO::String - Emulate file interface for in-core strings
  - IO::Wrap - Wrap raw filehandles in the IO::Handle interface
  - jQuery::File::Upload - Server-side solution for the jQuery File Upload plugin
  - Linux::FD - Linux specific special filehandles
  - Modern::Open - Autovivification, Autodie, and 3-args open support
  - Module::Case - Case sensitive module loading
  - Module::Filename - Provides an object oriented, cross platform interface for getting a module's filename
  - Open::This - Try to Do the Right Thing when opening files
  - Overload::FileCheck - Override/mock perl file check -X: -e, -f, -d, ...
  - Path::Class - Cross-platform path specification manipulation
  - Path::Class::Tiny - A Path::Tiny wrapper for Path::Class compatibility
  - Path::Iterator::Rule - Iterative, recursive file finder
  - Path::Tiny - Provides methods like slurp_utf8 and spew_utf8 to read and write files using the correct encoding
  - Regexp::Pattern::Filename::Type::Archive - Archive filename
  - Regexp::Pattern::Filename::Type::Audio - Audio filename
  - Regexp::Pattern::Filename::Type::Ebook - Ebook filename
  - Regexp::Pattern::Filename::Type::Image - Image filename
  - Regexp::Pattern::Filename::Type::Image::WhatsApp - Image filename saved by WhatsApp
  - Regexp::Pattern::Filename::Type::Media - Media (image/audio/video) filename
  - Regexp::Pattern::Filename::Type::Media::WhatsApp - Media (video, image) filename saved by WhatsApp
  - Regexp::Pattern::Filename::Type::Video - Video filename
  - rename - Renames multiple files using perl expressions
  - Storage::Abstract - Abstraction for file storage
  - Stream::Buffered - Temporary buffer to save bytes
  - Sys::Sendfile - Zero-copy data transfer
  - Sys::Sendfile::FreeBSD - Wrapper for the FreeBSD sendfile(2) function
  - Text::CSV - Comma-separated values manipulator (using XS or PurePerl)
  - Text::CSV::Encoded - Encoding aware Text::CSV
  - Text::CSV_PP - Text::CSV_XS compatible pure-Perl module
  - Text::CSV::Separator - Determine the field separator of a CSV file
  - Text::CSV::Slurp - Convert CSV into an array of hashes, or an array of hashes into CSV
  - Text::CSV_XS - Comma-separated values manipulation routines
  - Tie::File - Access the lines of a disk file via a Perl array
  - Win32::ChangeNotify - Monitor events related to files and directories
- FindDependencies
  - App::findeps - the Module to find dependencies for files you've selected
  - Module::ScanDeps - Recursively scan Perl code for dependencies
  - Module::ScanDeps::Static - A cleanup of rpmbuild's perl.req
- FontMatters
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Font::TTF - Perl module for TrueType Font hacking
  - Font::FreeType - Read font files and render glyphs from Perl using FreeType2
  - Font::Metrics - Advance widths, kerning and metrics for Standard 14 and TrueType fonts
  - Font::TTF::Font - Memory representation of a font
  - HarfBuzz::Shaper - Use HarfBuzz for text shaping
  - ⊕ Notes for HarfBuzz::Shaper
    - This module is not limited to TTFs
- Games
  - ⊕ See also
    - [Topic]
    - https://cowboyprogramming.com/2007/01/05/evolve-your-heirachy/
    - https://github.com/thrig/ministry-of-silly-vaults/
    - For Blossom word game
  - Acme::Hospital::Bed - The great new Acme::Hospital::Bed!
  - Acme::Matrix - Heavenly digital rain
  - Acme::MetaSyntactic::Themes - The original Acme::MetaSyntactic themes
  - Alien::SDL3 - Build and install SDL3
  - App::GUI::GoLP - A GUI for viewing and editing Life-like cellular automata, in Perl/Prima
  - App::wordlist::blossom - A wordlist wrapper to help list words for Blossom word game
  - App::puzzl - A CLI for writing & running Advent of Code solutions written in Perl
  - Chandra::Game::Tetris - Tetris built on Chandra
  - Chess::Plisco - A comprehensive chess library for Perl
  - Chess4p - A library for chess related functionality
  - Data::SCS::DefParser - A Perl module to parse units contained in SII definition files (plain text variant)
  - Game::Cribbage - Cribbage game engine
  - Game::DijkstraMap - A numeric grid of weights plus some related functions
  - Game::Entities - A simple entity registry for ECS designs
  - Game::FaceGenerator - A web app to combine random images into faces
  - Game::HexDescribe - A web app to add random table driven data to map data
  - Game::LevelMap - Level map representation
  - Game::Life - Plays Conway's Game of Life
  - Game::Life::Faster - Plays John Horton Conway's Game of Life
  - Game::PlatformsOfPeril - The platforms of peril
  - Game::TextMapper - A web app to generate maps based on text files
  - Game::TextPatterns - Generate patterns of text
  - Game::TileMap - Representation of tile-based two-dimensional rectangular maps
  - Games::Board - A parent class for board games
  - Games::Mahjongg::Solver::deBondt::FFI - Perl/FFI bindings to Mahjongg Solitaire Solver (after peeking) by Michiel de Bondt
  - Games::ScottAdams - Perl extension for representing Scott Adams games
  - Games::Solitaire::BlackHole::Solver - A solver for Black Hole Solitaire
  - Games::Sudoku::General - Solve sudoku-like puzzles
  - Games::Sudoku::Html - Visualize and play collections of standard 9x9 Sudoku in your browser
  - Games::Sudoku::PatternSolver - Solve and generate Sudoku 9x9 puzzles
  - Games::Sudoku::PatternSolver::Generator - Produces 9x9 Sudoku solution grids and 9x9 Sudoku puzzles
  - Games::Sudoku::Pdf - Produce pdf files from your digital Sudoku sources or collections
  - LibOrigin - Perl extension for making Origin games
  - Net::RCON::Minecraft - Minecraft RCON remote console
  - ⊕ Notes for Net::RCON::Minecraft
    - https://bugs.mojang.com/browse/MC/issues/MC-72390
  - Poker::Eval - Deal, score, and calculate expected win rates of poker hands
  - Run::WeeklyChallenge - Facilitates running a solution to https://theweeklychallenge.org using one or more sets of inputs provided as JSON command line arguments
  - SDL3 - Simple DirectMedia Layer 3.0
  - Task::MetaSyntactic - All Acme::MetaSyntactic themes at once
  - Term::Maze - Mazes in the terminal
  - WWW::ARDB - Perl client for the ARC Raiders Database API (ardb.app)
  - WWW::MetaForge - Perl client for MetaForge gaming APIs
- GenealogyStuff
  - DateTime::Format::Genealogy - Create a DateTime object from a Genealogy Date
  - ⊕ Notes for DateTime::Format::Genealogy
    - https://metacpan.org/dist/DateTime-Format-Genealogy
  - Gedcom::Individual - A module to manipulate GEDCOM individuals
  - Genealogy::ChroniclingAmerica - Find URLs for a given person on the Library of Congress Newspaper Records
  - Genealogy::FindaGrave - Find URLs on FindaGrave for a person
  - Genealogy::Gedcom::Date - Parse GEDCOM dates in French r/German/Gregorian/Hebrew/Julian
  - Genealogy::Military::Branch - Extract military branch from free-text genealogy notes
  - Genealogy::Obituary::Lookup - Lookup an obituary
  - Genealogy::Obituary::Parser - Extract structured family relationships from obituary text
  - Genealogy::Occupation - Normalise and translate genealogical occupation strings
  - Genealogy::Relationship - Calculate the relationship between two people
  - Genealogy::Relationship::Name - Return a genealogical relationship name from step counts
  - Genealogy::Wills - Lookup in a database of wills
  - HTML::Genealogy::Map - Extract and map genealogical events from a GEDCOM file
- GeographicStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://ipapi.com/
    - https://opencagedata.com/api
    - For API v3
    - https://what3words.com/
  - Alien::gdal - Compile GDAL, the Geographic Data Abstraction Library
  - Alien::libmaxminddb - Find or install libmaxminddb
  - App::geoip - A tool to show geographical data based on hostname or IP address(es)
  - Alien::geos::af - Compile GEOS, the Geometry Engine, Open Source
  - Alien::proj - Compile the Proj library
  - Data::OFN::Address - Immutable data object for OFN (OtevÅenÃ© formÃ¡lnÃ normy) representation of address in the Czech Republic
  - Data::OFN::Common - OFN common data objects
  - Geo::Address::Formatter - Take structured address data and format it according to the various global/country rules
  - Geo::Address::Parser - Lightweight country-aware address parser from flat text
  - Geo::Address::Parser::Country - Resolve a place string component to a canonical country name
  - Geo::AnomalyDetector - Detect anomalies in geospatial coordinate datasets
  - Geo::BUFR - Perl extension for handling of WMO BUFR files
  - ⊕ Notes for Geo::BUFR
    - https://wiki.met.no/bufr.pm/start
  - Geo::CheapRuler - A collection of very fast approximations to common geodesic measurements
  - Geo::Coder::Abbreviations - Quick and Dirty Interface to https://github.com/mapbox/geocoder-abbreviations
  - Geo::Coder::All - This is wrapper for other geocoder cpan modules
  - Geo::Coder::Bing - Geocode addresses with the Bing Maps API
  - Geo::Coder::CA - Provides a Geo-Coding functionality using https://geocoder.ca for both Canada and the US
  - Geo::Coder::Free - Provides a Geo-Coding functionality using free databases
  - Geo::Coder::GeoApify - Provides a Geo-Coding functionality using https://www.geoapify.com/maps-api/
  - Geo::Coder::GeocodeFarm - Geocode addresses with the GeocodeFarm API
  - Geo::Coder::Google::V3 - Google Maps Geocoding API V3
  - Geo::Coder::GooglePlaces::V3 - Google Places Geocoding API V3
  - Geo::Coder::List - Call many Geo-Coders
  - Geo::Coder::Many - Module to tie together multiple Geo::Coder::* modules
  - Geo::Coder::OpenCage - Geocode coordinates and addresses with the OpenCage Geocoding API
  - Geo::Coder::OSM - Geocode addresses with the OpenStreetMap Nominatim API
  - Geo::Coder::Ovi - Geocode addresses with the Ovi Maps API
  - Geo::Coder::Mapbox - Provides a Geo-Coding functionality using https://mapbox.com
  - ⊕ Notes for Geo::Coder::Mapbox
    - https://docs.mapbox.com/api/search/geocoding/
    - Based on Geo::Coder::GooglePlaces::V3 - Google Places Geocoding API V3
    - https://metacpan.org/pod/Geo::Coder::GooglePlaces::V3
  - Geo::Coder::TomTom - Geocode addresses with the TomTom Map Toolkit API
  - Geo::Coder::US::Census - Provides a Geo-Coding functionality for the US using https://geocoding.geo.census.gov
  - Geo::Coder::XYZ - Provides a Geo-Coding functionality using https://geocode.xyz
  - Geo::Converter::dms2dd - Parse and convert values in Degrees/Minutes/Seconds formats to decimal degrees
  - Geo::Coordinates::DecimalDegrees - Convert between degrees/minutes/seconds and decimal degrees
  - Geo::GDAL::FFI - A foreign function interface to GDAL
  - ⊕ Notes for Geo::GDAL::FFI
    - See also https://gdal.org/en/stable/
  - Geo::GeoNames - Perform geographical queries using GeoNames Web Services
  - Geo::Geos - Perl interface for GEOS C++ library
  - Geo::Geos::Algorithm - Fundamental computational geometry algorithms
  - Geo::Geos::Coordinate - The lightweight class used to store coordinates
  - Geo::Geos::Envelope - Defines a rectangular region of the 2D coordinate plane
  - Geo::Geos::Index::STRtree - A spatial index structure which uses the Sort-Tile-Recursive (STR) algorithm
  - ⊕ Notes for Geo::Geos::Index::STRtree
    - See also Tree::R, Tree::STR
  - Geo::GoogleEarth::AutoTour - Generate Google Earth Camera Tours from Tracks and Paths
  - Geo::H3 - H3 Geospatial Hexagon Indexing System
  - ⊕ Notes for Geo::H3
    - https://github.com/uber/h3
  - Geo::H3::FFI - Perl FFI binding to H3 v3.x library functions
  - Geo::Inverse - Calculate geographic distance from a latitude and longitude pair
  - Geo::IPinfo - The official Perl library for IPinfo
  - Geo::IP2Location - Look up of country etc (24 fields) using IP address. It supports both IPv4 and IPv6 addressing
  - Geo::IP2Proxy - Reverse search of IP addresses to detect VPN servers, etc
  - Geo::IPfree - Geo::IPfree - Look up the country of an IPv4 address
  - Geo::Leaflet - Generates a Leaflet JavaScript map web page
  - Geo::LibProj::cs2cs - IPC interface to PROJ cs2cs
  - Geo::Local::Server - Returns the configured coordinates of the local server
  - Geo::Location::IP - Map IP addresses to location information
  - Geo::Location::Point - Location information
  - Geo::Location::TimeZoneFinder - Map geographic coordinates to time zone names
  - Geo::IPinfo - The official Perl library for IPinfo
  - Geo::Point - A point on the globe
  - Geo::Proj4 - PROJ cartographic projections library
  - Geo::Shape - Base class for 2-dimensional points on the earth surface
  - Geo::Spline - Calculate geographic locations between GPS fixes
  - Geo::StreetAddress::US - Perl extension for parsing US street addresses
  - Geo::WeatherNWS - A simple way to get current weather data from the NWS
  - Geo::WebService::Elevation::USGS - Elevation queries against USGS web services
  - Geo::WebService::OpenCellID - Perl API for the opencellid.org database
  - Geo::What3Words - Turn WGS84 coordinates into three word addresses and vice-versa using what3words.com HTTPS API
  - Geography::States::Borders - Return the borders of states and provinces
  - GIS::Distance - Calculate geographic distances
  - ⊕ Notes for GIS::Distance
    - Contains GIS::Distance::Haversine etc
  - GIS::Distance::Fast - C implementation of GIS::Distance formulas
  - Google::GeoCoder::Smart - Simple Google Geocoding API client
  - HTML::GoogleMaps::V3 - A simple wrapper around the Google Maps API
  - ⊕ Notes for HTML::GoogleMaps::V3
    - See also Geo::Coder::GooglePlaces - Google Maps Geocoding API
  - HTML::OSM - A module to generate an interactive OpenStreetMap with customizable coordinates and zoom level
  - IBGE::Municipios - Interface para cÃ³digos de municÃpios do IBGE
  - IP::Geolocation::MMDB - Read MaxMind DB files
  - Net::API::Nominatim - Perl client for local or public OpenStreetMap Nominatim Geocoding service. Open source, unrestricted and free
  - Starlink::AST - Interface to the Starlink AST library
  - ⊕ Notes for Starlink::AST
    - The Starlink AST library provides facilities for transforming coordinates from one system to another in an object oriented manner
    - See also http://starlink.eao.hawaii.edu/starlink/AST
- GitStuff
  - ⊕ See also
    - [Topic]
    - https://libgit2.org/
    - https://www.addictivetips.com/ubuntu-linux-tips/best-github-clients-for-linux/
    - Compare 2 versions of a module
  - Alien::Build - Build external dependencies for use in CPAN
  - Alien::Build::Plugin::Download::GitHub - Alien::Build plugin to download from GitHub
  - Alien::Libgit2 - Find or build libgit2, the linkable Git library
  - App::GHGen - Comprehensive GitHub Actions workflow generator, analyzer, and optimizer
  - App::ghmulti - Helps when using multiple Github accounts with SSH keys
  - App::git_log_ch_usrdata - Change username and email address in git log
  - App::GitGot - A tool to make it easier to manage multiple git repositories
  - App::Git::Autofixup - Create fixup commits for topic branches
  - App::Git::Perl - Adds custom git command "git perl" to make it easier to monitor latest changes in perl modules, and make you collaborate faster
  - App::GitHubUtils - Utilities related to GitHub
  - App::GitKtti - Git flow helper scripts for safe branch management
  - App::GitUtils - Day-to-day command-line utilities for git
  - App::Workflow::Lint - Linter for GitHub Actions workflow files
  - Git::Bunch - Manage gitbunch directory (directory which contain git repos)
  - ⊕ Notes for Git::Bunch
    - But see http://joeyh.name/code/mr/
  - Git::Database - Provide access to the Git object database
  - Git::Grouper - Categorize git repositories into one/more groups and perform actions on them
  - Git::Hooks - Framework for implementing Git (and Gerrit) hooks
  - Git::Libgit2 - Low-level FFI bindings to libgit2
  - Git::Native - Native Git for Perl via libgit2 (FFI, no fork/exec)
  - Git::RemoteURL::Parse - Parse and classify Git remote URLs (GitHub, GitLab)
  - Git::Repository - Perl interface to Git repositories
  - ⊕ Notes for Git::Repository
    - But see Git::Native
  - Git::Server - Secure Git Server with more granular hooks capabilities than default git
  - ⊕ Notes for Git::Server
    - Similar purpose and functionality to Git::Hooks but more powerful with less dependencies
  - Git::Wrapper - Wrap git(7) command-line interface
  - ⊕ Notes for Git::Wrapper
    - But see Git::Native
  - GitHub::Actions - Work in GitHub Actions using native Perl
  - GitHub::Crud - Create, Read, Update, Delete files, commits, issues, and web hooks on GitHub
  - GitHub::RSS - Collect data from Github.com for feeding into RSS
  - git::workflow - Explains our company's git-workflow code
  - ⊕ Notes for git::workflow
    - https://ovid.github.io/articles/easy-git-workflow.html
  - Group::Git - Base module for group of git repository operations
  - Parse::Gitignore - Parse .gitignore files
  - PitHub - A Perl interface to github
  - ⊕ Notes for PitHub
    - Sample usage: https://perladvent.org/2022/2022-12-03.html
  - WWW::Gitea - Perl client for the Gitea REST API
- GnuPG
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://gnupg.org/index.html
    - [Topic]
  - GnuPG::Interface - Perl interface to GnuPG
- GoogleStuff
  - ⊕ See also
    - [Topic]
    - For a Google API key
    - For Google Books API
    - For Google Developer help
  - Google::Ads::GoogleAds::Client - This is the main interface to the Google Ads API
  - Google::Auth - Implements application default credentials and project ID detection
  - Google::gRPC - High-performance gRPC client library for Perl
  - Google::ISBNNumbers - Retrieve book info by ISBN number
  - Google::RestApi - Connection to Google REST APIs (currently Drive and Sheets)
  - Net::Google::Analytics::MeasurementProtocol - Send Google Analytics (GA4) user interaction data from Perl
  - Net::Google::Drive::Simple - Includes instructions on how to get a Client ID and token
- Graphs
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://gephi.org
    - For GraphML
    - https://en.wikipedia.org/wiki/Petri_net
  - Algorithm::Graphs::Reachable::Tiny - Compute reachable nodes in a graph
  - Data::Hopen - A dataflow library with first-class edges
  - ⊕ Notes for Data::Hopen
    - It is the underlying engine of the App::hopen cross-platform software build generator, but can be used for any dataflow task that can be represented as a directed acyclic graph (DAG)
  - Graph - Graph data structures and algorithms
  - Graph::Directed - Directed graphs
  - Graph::Easy - Convert or render graphs (as ASCII, HTML, SVG or via Graphviz)
  - Graph::Easy::As_svg - Output a Graph::Easy as Scalable Vector Graphics (SVG)
  - Graph::Easy::Introspect - Introspection and AST for Graph::Easy layouts
  - Graph::Grammar - A Perl implementation of a graph rewriting method (a.k.a. graph grammar)
  - ⊕ Notes for Graph::Grammar
    - Every rule is evaluated for each vertex in a graph and, if a match is found, an action associated with the rule is executed
  - Graph::Kruskal - Kruskal's Algorithm for Minimal Spanning Trees in Graphs
  - Graph::Layout::Aesthetic - A module for laying out graphs
  - Graph::Layout::Aesthetic::Topology - Graph topology for use by Graph::Layout::Aesthetic
  - Graph::MaxFlow - Compute maximum flow between 2 vertices in a graph
  - Graph::MoreUtils - Utilities for graphs
  - Graph::Nauty - Perl bindings for Nauty
  - ⊕ Notes for Graph::Nauty
    - https://pallini.di.uniroma1.it/
  - Graph::PetriNet - Perl extension for Petri Nets
  - Graph::Undirected - Undirected graphs
  - Graph::VF2 - VF2 subgraph isomorphism detection method for Perl Graph
  - GraphViz2 - A wrapper for AT&T's Graphviz
  - ⊕ Notes for GraphViz2
    - https://github.com/graphviz-perl
  - libplot - Part of GNU plotutils
  - ⊕ Notes for libplot
    - Docs: https://www.gnu.org/software/plotutils/
    - sudo apt-get install plotutils
    - Perl interface Graphics::Libplot - Perl extension for libplot plotting library
  - SVG - Perl extension for generating Scalable Vector Graphics (SVG) documents
  - Svg::Simple - Write Scalar Vector Graphics using Perl syntax
  - SVG::TT::Graph - Base module for generating SVG graphics
- HaikuOS
  - ⊕ See also
    - [Topic]
    - For the KDL specification
    - For the upstream C library
  - Alien::ckdl - Build and install ckdl, a C library for KDL documents
  - Text::KDL::XS - Fast KDL parser and emitter via libckdl
- HardwareStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://mikrotik.com/support/
    - The Standard for IoT Messaging
    - https://sourceforge.net/projects/linux-gpib
  - Alien::SIMDe - Find or build the SIMDe library
  - Asm::X86 - List of instructions and registers of x86-compatible processors, validating and converting instructions and memory references
  - BACnet::Device - High-level interface for BACnet device communication and COV subscriptions
  - Bread::Board - A solderless way to wire up your application components
  - Data::Power::Inspection - Power Equipment Fault Inspection and Troubleshooting Library
  - Device::AVR::UPDI - Interact with an AVR microcontroller over UPDI
  - Device::Chip::MAX7219Panel - Chip driver for a panel of MAX7219 modules
  - Device::Chip::SSD1306 - Chip driver for monochrome OLED modules
  - Device::Firmata - Module for controlling Firmata devices
  - Device::GPIB - Access a variety of generic and specific GPIB devices
  - Device::Serial::SLuRM - Communicate the SLÂµRM protocol over a serial port
  - Disk::SmartTools - Provide tools to work with disks via S.M.A.R.T.
  - MikroTik::Client - Non-blocking interface to MikroTik API
  - Net::Async::ArtNet - Use Art-Net with IO::Async
  - ⊕ Notes for Net::Async::ArtNet
    - https://en.wikipedia.org/wiki/Art-Net
  - Net::MQTT - Perl module for MQTT Protocol (http://mqtt.org/)
  - Net::MQTT::Simple - Minimal MQTT version 3 interface
  - OPCUA::Open62541 - Perl XS wrapper for open62541 OPC UA library
  - Physics::Ellipsometry::VASE - Variable Angle Spectroscopic Ellipsometry data fitting
  - Power::Outlet - Control and query network attached power outlets
  - Speak - Convert text to speech using Google's engine and play it on speakers
- HashHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - CGI::Expand - Convert flat hash to nested data using TT2's dot convention
  - ⊕ Notes for CGI::Expand
    - Module's See Also is useful
  - Data::Hash::Diff::Smart - Smart structural diff for Perl data structures
  - Data::Hash::Patch::Smart - Apply structural, wildcard, and array-aware patches to Perl data structures
  - Data::MultiValuedHash - Hash whose keys have multiple ordered values
  - Hash::Case - Base class for hashes with key-casing requirements
  - Hash::Flatten - Flatten/unflatten complex data hashes
  - Hash::Match - Match contents of a hash against rules
  - Hash::Merge - Merges arbitrarily deep hashes into a single hash
  - Hash::Merge::Simple - Recursively merge two or more hashes, simply
  - Hash::MultiValue - Store multiple values per key
  - Hash::Ordered - A fast, pure-Perl ordered hash class
  - Hash::Util - A selection of general-utility hash subroutines - Built-in
  - Hash::Util::Exists::Tiny - Some hash helper functions related to perl's "exists" function.
  - Hash::Util::FieldHash - Support for Inside-Out Classes. Built-in
  - Hash::Util::FieldHash::Compat - Use Hash::Util::FieldHash or ties, depending on availability
  - Hash::Util::Merge - Utility functions for merging hashes
  - Hash::Util::Pick - The non-destructive utilities for picking hash
  - Hash::Util::Set - Set operations on hash keys
  - Hash::Util::Set::XS - XS implementation of Hash::Util::Set
  - Hash::Wrap - Create on-the-fly objects from hashes
  - ⊕ Notes for Hash::Wrap
    - The pod's SEE-ALSO has a great list of alternatives
  - HTTP::Rollup - Translate an HTTP query string to a hierarchical structure
  - Pivot::ArrayOfHashes - Pivot arrays of hashes, such as those returned by DBI
  - Tie::Array::AsHash - Tie arrays as hashes by splitting lines on separator
  - Tie::Array::DBD - Tie a plain array to a database table
  - ⊕ Notes for Tie::Array::DBD
    - Contains Tie::Hash::DBD
  - Tie::DBI - Tie hashes to DBI relational databases
  - Tie::Hash - Base class definitions for tied hashes. Built-in
  - ⊕ Notes for Tie::Hash
    - Contains Tie::StdHash, Tie::ExtraHash
  - Tie::Hash::Abbrev - A hash which can be accessed using abbreviated keys
  - Tie::Hash::Abbrev::Smart - A hash which can be accessed using abbreviated keys
  - Tie::Hash::Array - A hash which is internally implemented as a sorted array
  - Tie::Hash::Create - Extend Tie::ExtraHash, enables the tie-object to reflect the tied array
  - Tie::Hash::Indexed - Ordered hashes for Perl
  - ⊕ Notes for Tie::Hash::Indexed
    - It generally fails tests on Perl 5.18 and above due to the hash randomization change
    - See https://metacpan.org/pod/Hash::Ordered#SEE-ALSO
  - Tie::Hash::KeysMask - Control key aliasing by mask function, e.g. omit case of character distinction
  - Tie::Hash::MultiValue - Store multiple values per key
  - Tie::Hash::MultiValueOpts - Store multiple values per option
  - Tie::InsertOrderHash - Insert-order-preserving tied hash
  - Tie::IxHash - Ordered associative arrays for Perl
  - ⊕ Notes for Tie::IxHash
    - Slow. See https://metacpan.org/pod/Hash::Ordered#SEE-ALSO
  - Tie::LLHash - Ordered hashes (quite slow)
  - Tie::OrderedHash - Ordered Hashes with a public C ABI
  - Tie::RefHash - Use references as hash keys
  - Tie::RefHash::Weak - A Tie::RefHash subclass with weakened references in the keys
  - Tie::StoredOrderHash - Ordered associative arrays for Perl
  - Util::H2O - Convert a hash into an object with methods
  - ⊕ Notes for Util::H2O
    - https://perladvent.org/2023/2023-12-22.html (reads config files, generates accessors)
    - https://perladvent.org/2022/2022-12-06.html
  - Util::H2O::More - Convenience utilities built on Util::H2O (baptise, d2o, INI/YAML/HTTP helpers, Getopt helpers)
- HealthMatters
  - ACME::2026 - Checklists for glorious 2026 goals
  - App::BPOMUtils::RPO::Ingredients - Group ingredients suitable for food label
  - App::MineralUtils - Utilities related to mineral supplements
  - Sah::SchemaBundle::Nutrient - Sah schemas related to nutrients
  - TableData::Health::Nutrient - Nutrients database
  - WWW::Search::PharmGKB - Search and retrieve information from the PharmGKB database
- HTMLHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://datatables.net
    - https://en.wikipedia.org/wiki/Litavis
    - http://savage.net.au/misc/Mojo.Wiki.html
    - https://www.w3.org/TR/REC-html40/sgml/entities.html
  - Alien::LibGumbo - Gumbo parser library
  - ⊕ Notes for Alien::LibGumbo
    - See also HTML::Gumbo
  - App::htidx - Generate static HTML directory listings
  - CGI::FormMagick - Easily create CGI form-based applications
  - Crayon - Dedupe, minify and extend CSS
  - ⊕ Notes for Crayon
    - But see Litavis below
  - Data::TableReader::Decoder::HTML - Access the tables of an HTML document
  - Form::Diva - Generate HTML5 form label and input fields
  - Form::Factory - A general-purpose form handling API
  - Form::Sensible - A sensible way to handle form based user interface
  - Form::Tiny - Input validator centered around Type::Tiny
  - ⊕ Notes for Form::Tiny
    - https://brtastic.xyz/blog/article/perl-form-tiny
  - Form::Toolkit - A toolkit to build Data centric Forms
  - HTML::AutoTag - Just another HTML tag generator
  - ⊕ Notes for HTML::AutoTag
    - Generate nested HTML (HTML4, XHTML and HTML5) tags with custom indentation, custom encoding and automatic attribute value rotation
  - HTML::Composer - Compose validated HTML from Perl data structures
  - HTML::Defang - Cleans HTML as well as CSS of scripting and other executable contents, and neutralises XSS attacks
  - HTML::Detoxifier - Practical module to strip harmful HTML
  - HTML::Display - Display HTML locally in a browser
  - ⊕ Notes for HTML::Display
    - Can be used by Spreadsheet::HTML. See SpreadsheetStuff
  - HTML::DOMbo - Convert between XML::DOM and {XML/HTML}::Element trees
  - HTML::ElementTable - Perl extension for manipulating a table composed of HTML::Element style components
  - HTML::Entities - Encode or decode strings with HTML entities
  - HTML::Entities::Numbered - Conversion of numbered HTML entities
  - HTML::Escape - Faster than HTML::Entities because it does less
  - HTML::Form - Class that represents an HTML form element
  - HTML::FormFu - HTML Form Creation, Rendering and Validation Framework
  - HTML::FromMail - Base-class for the HTML producers
  - HTML::GenerateUtil - Routines useful when generating HTML output
  - HTML::Gumbo - HTML5 parser based on gumbo C library
  - ⊕ Notes for HTML::Gumbo
    - See also Alien::LibGumbo
  - HTML::HTMLdoc - Perl interface to the htmldoc program for producing PDF Files from HTML content
  - ⊕ Notes for HTML::HTMLdoc
    - For htmldoc see https://www.msweet.org/htmldoc/
    - HTMLDOC converts HTML and Markdown source files or web pages to EPUB, PostScript, or PDF files with an optional table of contents
  - HTML::Object - HTML Parser, Modifier and Query Interface
  - ⊕ Notes for HTML::Object
    - This module is yet another HTML parser, manipulation and query interface, but probably the most comprehensive one
  - HTML::Parser - HTML parser class
  - ⊕ Notes for HTML::Parser
    - Contains HTML::Entities
  - HTML::ParseBrowser - Simple interface for User-Agent string parsing
  - HTML::PopupTreeSelect - HTML popup tree widget
  - HTML::RewriteAttributes - Concise attribute rewriting
  - HTML::Scrubber - Perl extension for scrubbing/sanitizing HTML
  - HTML::Selector::XPath - CSS Selector to XPath compiler
  - HTML::Similarity - Calculate the structural similarity between two HTML documents
  - HTML::Strip - Perl extension for stripping HTML markup from text
  - HTML::StripScripts - Strip scripting constructs out of HTML
  - HTML::TableContentParser - Do interesting things with the contents of tables
  - HTML::Tabulate - HTML table rendering class
  - HTML::Tagset - Data tables useful in parsing HTML
  - ⊕ Notes for HTML::Tagset
    - These hashes hold info per HTML tag about tags
  - HTML::Tidy - (X)HTML validation in a Perl object
  - HTML::Tiny - Lightweight, dependency free HTML/XML generation
  - HTML::Tree - Build and scan parse-trees of HTML
  - ⊕ Notes for HTML::Tree
    - Contains various articles
  - HTML::TreeBuilder - HTML::TreeBuilder - Parser that builds a HTML syntax tree
  - ⊕ Notes for HTML::TreeBuilder
    - Can be slow for large docs, hence the next module
  - HTML::TreeBuilder::LibXML - HTML::TreeBuilder and XPath compatible interface with libxml
  - ⊕ Notes for HTML::TreeBuilder::LibXML
    - HTML::TreeBuilder::LibXML is drop-in-replacement for HTML::TreeBuilder::XPath
  - HTML::TreeStructured - Perl extension for generating tree structured HTML- Has minimal documentation
  - ⊕ Notes for HTML::TreeStructured
    - But see HTML::PopupTreeSelect
  - HTML::T5 - HTML validation in a Perl object
  - ⊕ Notes for HTML::T5
    - This is a replacement for HTML::Lint
    - Requires Alien::TidyHTML5, which provides the C html-tidy library or ascertains its presence
  - HTML::Valid - Tidy/validate HTML
  - HTML::Zoom - Selector based streaming template engine
  - HTML5::DOM - Super fast html5 DOM library with css selectors (based on Modest/MyHTML)
  - Litavis - CSS preprocessor and compiler implemented in C via XS
  - MathML::Entities - Convert XHTML+MathML Named Entities to Numeric Character References
  - Mojo::DOM58 - Minimalistic HTML/XML DOM parser with CSS selectors
  - Rose::HTML::Objects - Object-oriented interfaces for HTML.
  - Tags::HTML::Container - There are many modules in this series. See e.g. UsernamePassword
  - ⊕ Notes for Tags::HTML::Container
    - And Tags::HTML::Page, Tags::HTML::Element etc
  - Tags::HTML::Footer - Tags helper for HTML footer
  - Tags::HTML::Messages - Tags helper for HTML messages
  - Text::CleanFragment - Clean up text to use as URL fragment or filename
  - Text::Table::HTML - Generate HTML table
  - Text::Table::HTML::DataTables - Generate HTML table with jQuery and DataTables plugin
  - Web::Query - Yet another scraping library like jQuery
  - WWW::ClickSource - Determine the source of a visit on your website : organic, adwords, facebook, referer site
  - XAO::Base - Set of base classes for the XAO family of products
  - XAO::FS - XAO framework database layer
  - XAO::Web - XAO Web Developer, dynamic content building suite
  - ⊕ Notes for XAO::Web
    - https://ejelta.com/xao/
- HTTPHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - http://blogs.perl.org/users/neilb/2011/10/cpan-modules-for-parsing-user-agent-strings.html
    - https://daniel.haxx.se/http2/
    - https://data-star.dev/
    - https://dev.to/fgasper/perling-and-curling-2i10
    - https://http2.github.io/
    - https://http3-explained.haxx.se/
    - https://nghttp2.org/
    - https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
    - http://savage.net.au/misc/Mojo.Wiki.html
  - Alien::nghttp2 - Find or build the nghttp2 HTTP/2 C library
  - Authen::WebAuthn - A library to add Web Authentication support to server applications
  - ⊕ Notes for Authen::WebAuthn
    - This module lets you validate Web Authentication registration and authentication responses
    - https://www.w3.org/TR/webauthn/
  - Business::Stripe::Webhook - A Perl module for handling webhooks sent by Stripe
  - CGI::Ajax - A perl-specific system for writing Asynchronous web applications
  - CGI::Expand - Convert flat hash to nested data using TT2's dot convention
  - CGI::Info - Information about the CGI environment
  - CGI::Session - Persistent session data in CGI applications
  - CGI::Session::Driver::mariadb - CGI::Session driver for MariaDB database
  - CGI::Simple - A Simple totally OO CGI interface that is CGI.pm compliant
  - Cookie - Cookie Object with Encryption or Signature
  - Cookie::Jar - Cookie Jar Class for Server & Client
  - Cookies::Roundtrip - Convert between different HTTP Cookie formats, well, at least we tried!
  - Data::URIID - Extractor for identifiers from URIs
  - ⊕ Notes for Data::URIID
    - See also File::FStore in FileHandling
  - Data::URIID::Base - Extractor for identifiers from URIs
  - Datastar::SSE - Module for creating Datastar Server Events
  - Duadua - Detect User-Agent, do up again! Parses the User-Agent string
  - FU - Framework Ultimatum: A Lean and Efficient Zero-Dependency Web Framework.
  - HTTP::UserAgentClientHints - Handles User Agent Client Hints (UA-CH)
  - ⊕ Notes for HTTP::UserAgentClientHints
    - https://github.com/WICG/ua-client-hints/blob/main/README.md
  - HTTP::Body - HTTP Body Parser
  - HTTP::BrowserDetect - Determine Web browser, version, and platform from an HTTP user agent string
  - HTTP::Cookies - HTTP cookie jars
  - HTTP::Cookies::Chrome - Cookie storage and management for Google Chrome
  - ⊕ Notes for HTTP::Cookies::Chrome
    - Uses HTTP::Cookies
  - HTTP::CookieJar::LWP - LWP adapter for HTTP::CookieJar
  - HTTP::Cookies::Microsoft - Access to Microsoft cookies files
  - HTTP::Cookies::Mozilla - Cookie storage and management for Mozilla
  - HTTP::Cookies::Netscape - Access to Netscape cookies files
  - HTTP::DetectUserAgent - Yet another HTTP useragent string parser
  - HTTP::DAV - A WebDAV client library for Perl5
  - HTTP::Headers - Class encapsulating HTTP Message headers
  - ⊕ Notes for HTTP::Headers
    - But see HTTP::XSHeaders
  - HTTP::Message - HTTP style message (base class)
  - HTTP::Parser::XS - A fast, primitive HTTP request parser
  - HTTP::Parser2::XS - Yet another http parser
  - HTTP::Promise - Asynchronous HTTP Request and Promise
  - HTTP::Promise::Stream::Brotli - Stream Encoder for Brotli Encoding
  - HTTP::Request::Common - Construct common HTTP::Request objects
  - HTTP::Request::FromCurl - Create a HTTP::Request from a curl command line
  - HTTP::Request::Webpush - HTTP Request for web push notifications
  - HTTP::Response - HTTP style response message
  - HTTP::SecureHeaders - Manage security headers with many safe defaults
  - ⊕ Notes for HTTP::SecureHeaders
    - https://cheatsheetseries.owasp.org/cheatsheets/HTTP_Headers_Cheat_Sheet.html
  - HTTP::Session2 - HTTP session management - Deprecated
  - HTTP::State - Fast RFC6265bis-draft + CHIPS Cookie Jar
  - ⊕ Notes for HTTP::State
    - See RfcGuide for rfc6265
  - HTTP::Status - HTTP Status code processing
  - HTTP::StructuredFieldValues - Encode and decode HTTP Structured Field Values (RFC 9651) in Perl
  - ⊕ Notes for HTTP::StructuredFieldValues
    - See RfcGuide for rfc9651
  - HTTP::Tiny - A small, simple, correct HTTP/1.1 client
  - ⊕ Notes for HTTP::Tiny
    - Uses IO::Socket::IP (or IO::Socket::INET)
    - Uses HTTP::CookieJar
    - Eschew HTTP::Lite
    - Contains interesting See Also
  - HTTP::Tinyish - HTTP::Tinyish is a wrapper module for HTTP client modules LWP, HTTP::Tiny and HTTP client software curl and wget
  - ⊕ Notes for HTTP::Tinyish
    - Backends are searched in the order of: LWP, HTTP::Tiny, curl and wget
    - HTTP::Tinyish will auto-detect if the backend also supports HTTPS, and use the appropriate backend based on the given URL to the request methods
  - HTTP::Tiny::Mech - Wrap a WWW::Mechanize instance in an HTTP::Tiny compatible interface.
  - HTTP::Tiny::UA - Higher-level UA features for HTTP::Tiny
  - HTTP::Validate - Validate and clean HTTP parameter values according to a set of rules
  - HTTP::XSHeaders - Fast XS Header library, replacing HTTP::Headers and HTTP::Headers::Fast
  - LightTCP::Server - A configurable TCP server with HTTP, CGI, and threading support (Pure Perl OOP)
  - LightTCP::SSLclient - SSL/TLS HTTP client with proxy support and certificate pinning
  - LWP::Protocol::https - Provide https support for LWP::UserAgent
  - LWP::Protocol::Net::Curl - The power of libcurl in the palm of your hands!
  - LWP::UserAgent - REST::Client
  - LWP::UserAgent::Throttled - Throttle requests to a site
  - Net::Amazon::Glacier - An implementation of the full Amazon Glacier RESTful 2012-06-01 API.
  - Net::Amazon::Signature::V4 - Implements the Amazon Web Services signature version 4, AWS4-HMAC-SHA256
  - Net::Curl - Perl interface for libcurl
  - ⊕ Notes for Net::Curl
    - Contains Net::Curl::Easy, but see Net::Curl::Easier
  - Net::Curl::Easier - Convenience wrapper around Net::Curl::Easy
  - Net::Curl::Easy - Perl interface for curl_easy_* functions
  - ⊕ Notes for Net::Curl::Easy
    - But see Net::Curl::Easier
  - Net::Firewall::BlockerHelper - Helps with managing firewalls for banning IPs
  - PApp - Multi-page-state-preserving web applications
  - ⊕ Notes for PApp
    - Expects you to use modperl or similar
  - Parse::HTTP::UserAgent - Parse User-Agent strings - Deprecated
  - ⊕ Notes for Parse::HTTP::UserAgent
    - Use HTTP::BrowserDetect instead
  - Protocol::Tus - Tus protocol handling
  - Query::Param - Lightweight object interface for parsing and creating query strings
  - Router::Boom - Fast routing engine for web applications
  - Router::R3 - URL router library with high performance
  - Router::Ragel - A high-performance URL router using the Ragel finite state machine
  - Router::Simple - Simple HTTP router
  - Router::XS - Fast URI path to value lookup
  - Slug - XS URL slug generator with custom ops
  - Squid::Guard - Redirector for the Squid web proxy
  - Terse - Lightweight Web Framework. Requires Plack
  - URI - Uniform Resource Identifiers (absolute and relative)
  - URI::_punycode - Encodes Unicode string in Punycode
  - ⊕ Notes for URI::_punycode
    - See also Net::IDN::Encode in DnsStuff
  - URI::AnyService - Simple /etc/services-driven URI objects
  - URI::Based - Define a base URI and then generate variations on it
  - URI::Escape - Percent-encode and percent-decode unsafe characters
  - URI::Escape::XS - Drop-In replacement for URI::Escape
  - URI::Router - Highest performance powerful URI router (URI path to value lookup) for HTTP frameworks
  - URI::Shortener - Shorten URIs so that you don't have to rely on external services
  - URI::Split - Parse and compose URI strings
  - URI::Template - Object for handling URI templates (RFC 6570)
  - ⊕ Notes for URI::Template
    - See RfcGuide for rfc6570
  - URL::Encode - Encoding and decoding of application/x-www-form-urlencoded encoding
  - URL::Encode::XS - XS implementation of URL::Encode
  - VAPID - Voluntary Application Server Identification
  - Web::Components - MVC pattern for Web::Simple
  - Web::ComposableRequest - Composable request class for web frameworks
  - Web::Simple - A quick and easy way to build simple web applications
  - WWW::Chain - A web request chain
  - WWW::Mechanize - You must, after every action that GETs or POSTs a page, check that Mech succeeded, or all bets are off
- HTTPServers
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - PlackServer -For what came before PAGI
    - http://nginx.org/en/docs/
    - https://github.com/h2o/picohttpparser
    - http://savage.net.au/misc/Mojo.Wiki.html
  - Amon2 - Lightweight web application framework
  - Amon2::Plugin::Web::CSRFDefender - Anti CSRF filter - Deprecated
  - Apertur::SDK - Official Perl SDK for the Apertur API
  - App::HTTPThis - Export the current directory over HTTP
  - ⊕ Notes for App::HTTPThis
    - Actually, this is just a very thin wrapper around Plack::App::DirectoryIndex
  - Async::Microservice - Async HTTP Microservice Moose Role
  - CGI::ACL - Decide whether to allow a client to run this script
  - CGI::Alternatives - Documentation for alternative solutions to CGI.pm
  - ClearPress - Simple, vaguely-MVC web application framework
  - ⊕ Notes for ClearPress
    - http://clearpress.net/
  - Furl - Lightning-fast URL fetcher
  - ⊕ Notes for Furl
    - Furl is a replacement for LWP
  - Gears - A framework to build web frameworks
  - HTTP::CryptoCookie - Perl extension for encrypted HTTP cookies
  - HTTP::Handy - A tiny HTTP/1.0 server for Perl 5.5.3 and later
  - ⊕ Notes for HTTP::Handy
    - See also HP::Handy
  - HTTP::ServerEvent - Create strings for HTTP Server Sent Events
  - HTTP::Server::Simple - Lightweight HTTP server
  - HTTP::Server::Simple::CGI - CGI.pm-style version of HTTP::Server::Simple
  - Hypersonic - Blazing fast HTTP server with JIT-compiled C event loop
  - Minima - Efficient web framework built with modern core classes
  - Mojolicious - Real-time web framework
  - ⊕ Notes for Mojolicious
    - Mojo::Base::Tiny
    - Data::Object
    - FlightRecorder
    - Mojo::UserAgent::Cached
  - Monoceros - PSGI/Plack server with event driven connection manager, preforking workers
  - Net::Async::HTTP - Use HTTP with IO::Async
  - Net::Async::HTTP::Server - Serve HTTP with IO::Async
  - Net::Async::MCP::Server - Async MCP server base class
  - Net::HTTP - Low-level HTTP connection (client)
  - ⊕ Notes for Net::HTTP
    - Contains Net::HTTPS
  - Net::HTTP::API - Easily create client for net API
  - Net::HTTP::NB - Non-blocking HTTP client
  - Net::HTTP2 - HTTP/2 in Perl, simplified
  - Net::HTTP2::nghttp2 - Perl XS bindings for nghttp2 HTTP/2 library
  - Net::Respite - Representational State (Perl Iscool) Transfer Engine
  - Net::Server - Extensible, general Perl server engine
  - ⊕ Notes for Net::Server
    - Has a massive amount of flexibility
  - NetServer::Generic - Generic TCP/IP server class
  - Net::Server::HTTP - Very basic Net::Server based HTTP server class
  - ⊕ Notes for Net::Server::HTTP
    - See also Net::Server::Fork, Net::Server::INET, Net::Server::PreFork, Net::Server::PreForkSimple, Net::Server::MultiType, Net::Server::Single Net::Server::SIG Net::Server::Daemonize Net::Server::Proto
  - Net::Server::PreFork - Net::Server personality
  - Net::Server::SS::PreFork - A hot-deployable variant of Net::Server::PreFork
  - PAGI - Perl Asynchronous Gateway Interface
  - PAGI::Middleware - Base class for PAGI middleware
  - PAGI::Middleware::AccessLog - Request logging middleware
  - PAGI::Middleware::Builder - DSL for composing PAGI middleware
  - PAGI::Middleware::Session::Store::Cookie - Encrypted client-side session store
  - PAGI::Server - PAGI Reference Server Implementation
  - PAGI::Tools - Application toolkit for the PAGI specification
  - PAGI::Tutorial - A comprehensive guide to building async web applications with PAGI
  - Protocol::HTTP - Very fast HTTP protocol incremental parser and serializer
  - Protocol::HTTP::Compression::Brotli - Brotli compression plugin for Protocol::HTTP
  - Protocol::HTTP::Response - HTTP response class
  - Protocol::HTTP2 - HTTP/2 protocol implementation (RFC 7540)
  - ⊕ Notes for Protocol::HTTP2
    - See RfcGide to rfc7540
  - Shuvgey - AnyEvent HTTP/2 (RFC 7540) Server for PSGI
  - ⊕ Notes for Shuvgey
    - See TheRFCGuide for rfc7540
  - PSGI - Perl Web Server Gateway Interface Specification
  - PSGI::Handy - A tiny dependency-free PSGI web framework for Perl 5.005_03 and later
  - Server::Starter - A superdaemon for hot-deploying server programs
  - Session::Storage::Secure - Encrypted, expiring, compressed, serialized session data with integrity
  - Starlet - A simple, high-performance PSGI/Plack HTTP server
  - Starman - High-performance preforking PSGI/Plack web server
  - Task::WebDyne::Apache - Prerequisite modules for running WebDyne under Apache
  - Task::WebDyne::PAGI - Install PAGI dependencies for WebDyne
  - Task::WebDyne::Plack - Optional Plack integration for WebDyne
  - Task::WebDyne::Starman - Optional Starman integration for WebDyne
  - Thunderhorse - A no-compromises brutally-good web framework
  - Trickster - A modern, battle-tested micro-framework for Perl web applications
  - Tvh::Htsp::Client - A Tvheadend HTSP client library written in perl
  - Twiggy - AnyEvent HTTP server for PSGI
  - UniEvent::HTTP::Manager - Extremely fast asynchronous preforking / threading event based web server
  - WebDyne - Dynamic Perl web application framework with template compilation and modular design
  - WWW::Session::Storage::Redis - Redis storage for WWW::Session
- HumanRights
  - ⊕ See also
    - [Topic]
  - Business::LegalRepData - Access to HUDOC Database
  - ECHR::OpenData - Access to HUDOC Database
- IoLayers
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - IO::Divert - Divert STDOUT to capture and process output
  - IO::Pty - Pseudo TTY object class
  - IO::Stty - Change and print terminal line settings
  - IO::Tty - Low-level allocate a pseudo-Tty, import constants
  - IOLayer::QuotedPrint - PerlIO layer for quoted-printable strings
  - PerlIO::gzip - Perl extension to provide a PerlIO layer to gzip/gunzip
  - PerlIO::utf8_strict - Fast and correct UTF-8 IO
  - PerlIO::Via::Base64 - PerlIO layer for base64 (MIME) encoded strings
  - ⊕ Notes for PerlIO::Via::Base64
    - Beware the capital 'V' in the name, unlike the following, which use 'v'
  - PerlIO::via::Include - PerlIO layer for including other files
  - PerlIO::via::LineNumber - PerlIO layer for prefixing line numbers
  - PerlIO::via::MD5 - PerlIO layer for creating an MD5 digest of a file
  - ⊕ Notes for PerlIO::via::MD5
    - Uses Digest::MD5
    - Handles b64digest, digest and hexdigest
  - PerlIO::via::Pod - PerlIO layer for extracting plain old documentation
  - PerlIO::via::QuotedPrint - PerlIO layer for quoted-printable strings
  - PerlIO::via::Rotate - PerlIO layer for encoding using rotational deviation (rot13 etc)
  - PerlIO::via::StripHTML - PerlIO layer to strip HTML tags from an input file
  - PerlIO::via::UnComment - PerlIO layer for removing comments
  - PerlIO::via::UnPod - PerlIO layer for removing plain old documentation
  - PerlIO::via:xz - PerlIO layer for XZ (de)compression
  - ⊕ Notes for PerlIO::via:xz
    - Uses IO::Compress::Xz and IO::Uncompress::UnXz
- JavaScript
  - ⊕ See also
  - JE - Pure-Perl ECMAScript (JavaScript) Engine
  - JavaScript::Duktape - Perl interface to Duktape embeddable javascript engine
  - ⊕ Notes for JavaScript::Duktape
    - See also https://duktape.org/api.html and https://duktape.org/guide
  - JavaScript::Minifier - Perl extension for minifying JavaScript code
  - JavaScript::Minifier::XS - XS based JavaScript minifier
  - JavaScript::Packer - Perl version of Dean Edwards' Packer.js
  - JavaScript::QuickJS - Run JavaScript via QuickJS in Perl
  - JavaScript::SpiderMonkey - Perl interface to the JavaScript Engine
  - JavaScript::V8::XS - Perl XS binding for the V8 Javascript embeddable engine
  - JQ::Lite - A lightweight jq-like JSON query engine in Perl
  - ⊕ Notes for JQ::Lite
    - Sample code
- JsonStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - CSS.and.Javascript.html - for jq and JSON::JQ
    - https://github.com/json-schema/JSON-Schema-Test-Suite
    - https://jsonlines.org/
    - https://json-model.org/#/
    - https://json-schema.org
    - https://json-schema.org/understanding-json-schema/reference
    - https://json-structure.org/
    - http://jwt.io/
    - http://self-issued.info/docs/draft-jones-json-web-token-06.html
    - http://tools.ietf.org/html/draft-zyp-json-schema
    - https://www.json.org/json-en.html
    - https://www.relaxedjson.org/specification
    - For Mojo::JSON
  - Acme::JWT - JWT utilities
  - App::jsonvalidate - App harness for the jsonvalidate CLI
  - CBOR::Free - Fast CBOR for everyone
  - ⊕ Notes for CBOR::Free
    - See RfcGuide for rfc7049
  - CBOR::XS - Concise Binary Object Representation (CBOR, RFC7049)
  - Class::JSON_Object - Role for Class::JSON_Object
  - Cpanel::JSON::XS - cPanel fork of JSON::XS, fast and correct serializing
  - ⊕ Notes for Cpanel::JSON::XS
    - Recommended despite the old comments below
    - Marc Lehmann has (long ago?) said bad things about this module. See the POD for JSON::SIMD, under Interoperability as above
    - It can be necessary. See ~/bin/test.cpanel.json.xs.type.pl
  - Data::Ref::JSON - Provide Perl reference code to access values in an arbitrary JSON data structure
  - JSON::Any - Wrapper Class for the various JSON classes - Deprecated
  - JSON::API - Module to interact with a JSON API
  - JSON::Create - Encodes Perl variables into JSON
  - JSON::GRDDL - Transform JSON to RDF
  - JSON::Hyper - Extract links from JSON via a schema
  - JSON::JSONFold - Compact, readable JSON formatting
  - JSON::JsonModel - Perl Runtime for JSON Model
  - JSON::Lines - Parse JSONLines with perl
  - JSON::LINQ - LINQ-style query interface for JSON and JSONL files
  - JSON::MaybeXS - Use Cpanel::JSON::XS with a fallback to JSON::XS and JSON::PP
  - JSON::Path - Implements JSONPath, an XPath-like language for searching JSON-like structures
  - ⊕ Notes for JSON::Path
    - JSONPath is described at http://goessner.net/articles/JsonPath/
  - JSON::Pointer - A Perl implementation of JSON Pointer (RFC6901)
  - JSON::PP - JSON::XS compatible pure-Perl module
  - JSON::Relaxed - An extension of JSON that allows for better human-readability
  - JSON::RPC - JSON RPC 2.0 Server Implementation
  - JSON::RPC::Common - Transport agnostic JSON RPC helper objects
  - JSON::RPC::Dispatcher - A JSON-RPC 2.0 server
  - JSON::RPC::Simple - Simple JSON-RPC client and dispatcher (WD 1.1 subset only currently)
  - JSON::RPC::Simple::Lite - A simple and lite JSON-RPC client
  - JSON::RPC::Spec - Yet another JSON-RPC 2.0 Implementation
  - JSON::RPC2 - Transport-independent implementation of JSON-RPC 2.0
  - JSON::Schema - Validate JSON against a schema
  - JSON::Schema::AsType - Generates Type::Tiny types out of JSON schemas
  - JSON::Schema::Generate - Generate JSON Schemas from data!
  - JSON::Schema::Modern - Validate data against a schema using a JSON Schema
  - JSON::Schema::Tiny - Validate data against a schema, minimally
  - JSON::Schema::Types - Create Type::Tiny types defined by JSON Schemas
  - JSON::Schema::Validate - Lean, recursion-safe JSON Schema validator (Draft 2020-12)
  - JSON::SIMD - JSON serialising/deserialising, done correctly and faster
  - JSON::Structure - JSON Structure validation library for Perl
  - JSON::Syck - JSON is YAML (but consider using JSON::XS instead!)
  - ⊕ Notes for JSON::Syck
    - See also YAML::Syck
  - JSON::T - Transform JSON using JsonT
  - ⊕ Notes for JSON::T
    - http://goessner.net/articles/jsont/
  - JSON::Tiny - Minimalistic JSON. No dependencies
  - JSON::ToHTML - Render JSON-based Perl datastructures as HTML tables
  - JSON::Typist - Replace mushy strings and numbers with rigidly typed replacements
  - JSON::Validator - Validate data against a JSON schema
  - JSON::WebToken - JSON Web Token (JWT) implementation
  - JSON::XS - JSON serialising/deserialising, done correctly and fast
  - JSON::YY - Fast JSON encoder/decoder with document manipulation API, backed by yyjson
  - JSONL::Subset - Extract a percentage of lines from a JSONL file
  - JSV - A perl implementation of JSON Schema (draft-04) validator
  - JSV::Validator - A perl implementation of JSON Schema (draft-04) validator
  - mb::JSON - A simple JSON parser for multibyte string
  - RPC::JSON - JSON-RPC Client Library
  - Schema::Validator - Tools for validating and loading Schema.org vocabulary definitions
  - Voxgig::Struct - Perl port of the canonical TypeScript implementation
- KohaLibrary
  - ⊕ See also
    - https://koha-community.org/
  - Koha::Contrib::ValueBuilder::RepeatableAutocomplete - Repeatable autcomplete value-builder for Koha
  - Koha::Contrib::Sudoc - Chargeur Koha par Tamil
- KubernetesStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - Uses Kubernetes
    - Secret handling
  - IO::K8s - Objects representing things found in the Kubernetes API
  - Kubernetes::REST - A Perl REST Client for the Kubernetes API
  - Net::Async::Kubernetes - Async Kubernetes client for IO::Async
  - Net::Async::Zitadel - Async Perl client for Zitadel identity management (IO::Async + Future)
  - WWW::Zitadel - Perl client for Zitadel identity management (OIDC + Management API)
- LaTeX
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - BeamerReveal - Manage the media files generated for the Reveal HTML presentation
  - ⊕ Notes for BeamerReveal
    - Converts LaTeX Beamer (PDF-centric) presentations into Reveal.js (Web-centric) HTML presentations
    - In this ecosystem, the .rvl file is a Reveal Configuration/Manifest file. It acts as the "instruction manual" for the conversion process
  - LaTeX::Driver - Latex driver
  - LaTeX::Easy::Templates - Easily format content into PDF/PS/DVI with LaTeX templates
  - ⊕ Notes for LaTeX::Easy::Templates
    - Format text content, living in a Perl data structure, into printer-ready documents (PDF/Postscript/DVI)
    - Documents how to install LaTeX
    - Uses Text::Xslate
  - LaTeX::Encode - Encode characters for LaTeX formatting
  - LaTeX::Replicase - Perl extension implementing a minimalistic engine for filling real TeX-LaTeX files that act as templates
  - LaTeX::Table - Perl extension for the automatic generation of LaTeX tables
  - LaTeX::ToUnicode - Convert LaTeX commands to Unicode
  - Template::Latex - LaTeX support for the Template Toolkit
- LicenceStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - Yes, licence is spelled that way in Australia
  - App::Licensecheck - Functions for a simple license checker for source files
  - App::Software::License - software-license --holder 'Paul Marquess' --year 1995 --license Perl_5 --type license > LICENSE
  - Cavil::Matcher - Next-generation license pattern matcher for Cavil
  - Enterprise::Licence - Licence or License
  - License::SPDX - Object for SPDX licenses handling
  - Module::LicenseScanner - This file is used to gather all CPAN licenses from third party dependencies
  - Regexp::Pattern::License - Regular expressions for legal licenses
  - Software::Copyright - Copyright class
  - Software::License - Packages that provide templated software licenses
  - Software::License::MIT_0 - MIT No Attribution License (MIT-0)
  - Software::Policies - Create policy files: CODE_OF_CONDUCT, CONTRIBUTING, FUNDING, GOVERNANCE, SECURITY, SUPPORT, etc
  - Software::Policy::CodeOfConduct - Generate a Code of Conduct policy
- LinguaStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/J%C5%8Dy%C5%8D_kanji
    - https://en.wikipedia.org/wiki/Jinmeiy%C5%8D_kanji
  - App::Gimei - A CLI app for Data::Gimei, a module generating fake Japanese names and addresses
  - Calendar::Indonesia::Holiday - List Indonesian public holidays
  - CGI::Lingua - Create a multilingual web page
  - Convert::CEGH - Coptic/Ethiopic/Greek/Hebrew Gematria & Transliteration
  - Convert::Number::Coptic - Convert Between Western and Coptic Numeral Systems
  - Convert::Number::Digits - Convert Digits Between the Scripts of Unicode
  - Convert::Number::Ethiopic - Convert Between Western and Ethiopic Numeral Systems
  - ⊕ Notes for Convert::Number::Ethiopic
    - See also https://ethiopic.com/
  - Convert::Number::Roman - Convert Between Western and Roman Numeral Systems
  - Date::Ethiopic - ICalendar for the Ethiopic Calendar System
  - Data::Gimei - A Perl module ported from Ruby's gimei that randomly generates Japanese names and addresses
  - Data::HanConvert - The data for converting between traditional and simplified Chinese languages
  - Data::Validate::Japanese - Validate Japanese Input
  - DateTime::Calendar::Coptic - DateTime Module for the Coptic Calendar System.
  - I18N::Langinfo - Query locale information
  - I18N::LangTags - Functions for dealing with RFC3066-style language tags
  - ⊕ Notes for I18N::LangTags
    - See TheRFCGuide for rfc3066
  - I18N::LangTags::Detect - Detect the user's language preferences
  - I18N::LangTags::List - Tags and names for human languages
  - Jacode - Perl program for Japanese character code conversion
  - Jacode4e - Converts Character Encodings for Enterprise in Japan
  - Jacode4e::RoundTrip - Converts JIS X 0213 Encodings with Round-Trip
  - Koha::Contrib::Tamil - Various scripts to manage Koha instances
  - Lingua::Boolean::Tiny - A smaller Lingua::Boolean, with support for more languages
  - Lingua::AFR::Numbers - Converts numeric values into their Afrikaans equivalents
  - Lingua::AFR::Word2Num - Converts Afrikaans words into numbers
  - Lingua::DEU::Word2Num - Word 2 Number conversion in DEU
  - Lingua::EN::ABC - American, British, and Canadian English
  - Lingua::EN::AddressParse - Extract components of a street address from free format text
  - Lingua::EN::GivenNames - An SQLite database of derivations of English given names
  - Lingua::EN::Infinitive - Determine the infinitive form of a conjugated word
  - Lingua::EN::Inflexion - Inflect English nouns, verbs, adjectives, and articles
  - Lingua::EN::NameCase - Correctly case a person's name from UPPERCASE or lowcase
  - Lingua::EN::NameParse - Extract the components of a person or couples full name, from free form text
  - Lingua::EN::Nickname - Genealogical nickname matching (Liz=Beth)
  - Lingua::EN::Segmenter - Subdivide texts into passages that represent subtopics
  - Lingua::EN::StopWords - Typical stop words for an English corpus
  - ⊕ Notes for Lingua::EN::StopWords
    - See Lingua::StopWords below
  - Lingua::EN::StopWordList - A sorted list of English stop words
  - Lingua::EN::Titlecase - Titlecase English words by traditional editorial rules
  - Lingua::EN::TitleParse - Parse titles in people's names
  - Lingua::EN::Titlecase::Simple - John Gruber's headline capitalization script
  - ⊕ Notes for Lingua::EN::Titlecase::Simple
    - Lingua::EN::Titlecase provides a much more heavyweight, modular solution for the same problem
  - Lingua::famibeib - Module to interact with the famibeib artificial language
  - Lingua::FR::Numbers::Ordinate - Go from cardinal number (4) to ordinal ("4Ã¨me")
  - Lingua::Interset - DZ Interset is a universal morphosyntactic feature set to which all tagsets of all corpora/languages can be mapped
  - Lingua::JA::KanjiTable - User-Defined Character Properties for Joyo Kanji and Jinmeiyo Kanji
  - Lingua::JA::Moji - Handle many kinds of Japanese characters
  - Lingua::JA::Name::Splitter - Split a Japanese name into given and family
  - Lingua::JPN::Word2Num - Word to number conversion in Japanese
  - Lingua::ManagementSpeak - Tool to generate managerial-sounding text and full documents
  - Lingua::NameUtils - Identify given/family names and capitalize correctly
  - Lingua::RO::Numbers - Convert numeric values into their Romanian string equivalents and viceversa
  - Lingua-RU-Numeral - Perl extension for generate Russian wording of numerals from the natural numbers and 0 (zero)
  - Lingua::RU::Num2Word - Numbers to words in Russian (without currency, but with specified gender)
  - Lingua::RUS::Num2Word - Converts numbers to money sum in words (in Russian roubles)
  - Lingua::Stem - Stemming of words
  - Lingua::Stem::Snowball - Perl interface to Snowball stemmers
  - Lingua::StopWords - Stop words for several languages
  - ⊕ Notes for Lingua::StopWords
    - See Lingua::EN::StopWords above
  - Lingua::String - Class to contain a string in many different languages
  - Lingua::Text - Class to contain text in many different languages
  - Locale::Maketext - Framework for localization
  - Locale::Maketext::TPJ13 - Article about software localization
  - String::Equivalence::Amharic - Normalization Utilities for Amharic
  - String::ProperCase::Surname - Converts Surnames to Proper Case
  - Task::Lingua::Num2Word - Install all PetaMem number-to-word conversion modules
  - Task::Lingua::PetaMem - Install all PetaMem Lingua number conversion modules
  - Task::Lingua::Word2Num - Install all PetaMem word-to-number conversion modules
  - Text::DoubleMetaphone - Phonetic encoding of words.
  - Text::Metaphone - A modern soundex. Phonetic encoding of words
  - Text::Metaphone::Amharic - The Metaphone Algorithm for Amharic
  - Text::Phonetic::Metaphone - Metaphone algorithm
  - Text::TransMetaphone - Translingual Phonetic Encoding of Words
  - Text::WagnerFischer::Amharic - The Wagner-Fischer Algorithm for Amharic
  - Unicode::Japanese - Convert encoding of Japanese text
  - Win32::Locale - Get the current MSWin locale or language
- LinuxOS
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://www.devuan.org/
    - https://xfce.org/
  - App::RPM::Spec::License - Base class for rpm-spec-license tool
  - Linux::Clone - An interface to the linux clone, unshare, setns, pivot_root and kcmp syscalls
  - Linux::Event - Front door for the Linux::Event ecosystem
  - Linux::Event::Clock - Cached monotonic time and deadline math for Linux::Event schedulers
  - Linux::Event::Connect - Non-blocking outbound socket connect for Linux::Event
  - Linux::Event::Fork - Minimal async child spawning on top of Linux::Event
  - Linux::Event::Listen - Listening sockets for Linux::Event
  - Linux::Event::Loop - Linux-native event loop (epoll + timerfd + signalfd + eventfd + pidfd)
  - Linux::Event::Stream - Buffered, backpressure-aware I/O for nonblocking file descriptors
  - Linux::Event::Timer - Thin wrapper around Linux::FD::Timer (timerfd)
  - Linux::Event::Watcher - Mutable watcher handle for Linux::Event::Loop
  - Linux::FD - Linux specific special filehandles
  - ⊕ Notes for Linux::FD
    - Contains Linux::FD::Event, Linux::FD::Signal, Linux::FD::Timer
  - Linux::FD::Mem - Memory file descriptors
  - Linux::Inotify - Classes for supporting inotify in Linux Kernel >= 2.6.13
  - Linux::Inotify2 - Scalable directory/file change notification
  - Linux::Perl - Linux system calls with pure Perl
  - Linux::Prctl - Perl extension for controlling process characteristics
  - Linux::Socket::Accept4 - Accept4(2) bindings for Perl5
  - Parse::RPM::Spec - Perl extension to parse RPM spec files
  - RPM::Query - Perl object overlay of the RPM query command
- LocaleStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - For Locale::TextDomain::FAQ etc
  - Convert::Number::Digits - Convert Digits Between the Scripts of Unicode.
  - ⊕ Notes for Convert::Number::Digits
    - Methods included
  - Data::Localize::Format::Maketext - Maketext Formatter
  - ⊕ Notes for Data::Localize::Format::Maketext
    - Warning: POD is void
  - Data::Localize::Format::Sprintf - Format strings using regular sprintf
  - DateTime::Locale - Localization support for DateTime.pm
  - Locale::AU - Abbreviations for territory and state identification in Australia and vice versa
  - Locale::CA - Two letter codes for province identification in Canada and vice versa
  - Locale::Codes - A distribution of many modules to handle locale codes
  - ⊕ Notes for Locale::Codes
    - For example, there are codes associated with different countries, different currencies, different languages, etc
  - Locale::Country - Module for dealing with country code sets
  - Locale::Country::Multilingual - To translate country names
  - Locale::gettext - Message handling functions
  - Locale::Intl - A Web Intl.Locale Class Implementation
  - Locale::Maketext - Framework for localization
  - Locale::Maketext::Lexicon - Use other catalog formats in Maketext
  - Locale::Maketext::Lexicon::DB - Dynamically load lexicon from a database table
  - Locale::Maketext::Lexicon::Gettext - PO and MO file parser for Maketext
  - Locale::Maketext::Utils - Adds some utility functionality and failure handling to Local::Maketext handles
  - Locale::Messages - Gettext Like Message Retrieval
  - Locale::Object - An object-oriented representation of locale information.
  - ⊕ Notes for Locale::Object
    - Contains Locale::Object::Continent, Locale::Object::Country, Locale::Object::Currency, Locale::Object::CurrencyConverter, Locale::Object::DB, Locale::Object::Language
  - Locale::Places - Translate places between different languages using http://download.geonames.org/
  - Locale::Simple - Functions for translate text based on gettext data, also in JavaScript
  - Locale::SubCountry - Convert state, province, county etc. names to/from ISO 3166-2 codes, get all states in a country
  - Locale::TextDomain - Perl Interface to Uniforum Message Translation
  - ⊕ Notes for Locale::TextDomain
    - Included in https://metacpan.org/dist/libintl-perl
    - The latter also contains Locale::Util - Portable l10n and i10n functions, and many others
  - Locale::TextDomain::OO::Extract - Extracts internationalization data
  - ⊕ Notes for Locale::TextDomain::OO::Extract
    - Includes a long list of examples
  - Locale::Unicode - Unicode Locale Identifier compliant with BCP47 and CLDR
  - ⊕ Notes for Locale::Unicode
    - Locale::Unicode::Boolean Boolean: Representation Class
    - Locale::Unicode::Exception Locale: Unicode Exception C
  - Locale::Unicode::Data - Unicode CLDR SQL Data
  - Locale::US - Two letter codes for state identification in the United States and vice versa
  - Locale::VersionedMessages - Handle all aspects of the localization process
  - Telugu::TGC - Tailored Grapheme Clusters for Telugu language
  - Unicode::Japanese - Convert encoding of japanese text
- LoggingStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://savage.net.au/misc/Mojo.Wiki.html
  - DBI::Log - Log all DBI queries
  - ⊕ Notes for DBI::Log
    - POD refers to DBIx::Class::UnicornLogger, DBIx::Class::Storage::Debug::PrettyTrace
  - eris - eris exists to transform unstructured, chaotic log data into structured messages
  - Log::Abstraction - Logging Abstraction Layer
  - Log::Any - Bringing loggers and listeners together
  - Log::Any::Adapter::Base - No description
  - Log::Any::Adapter::MacOS::OSLog - Log to macOS' unified logging system
  - Log::Any::Adapter::MojoLog - Log::Any integration for Mojo::Log
  - Log::Any::Adapter::Util - Common utility functions for Log::Any
  - Log::Dispatch - Dispatches messages to one or more outputs
  - Log::Dispatch::Email - Base class for objects that send log messages via email
  - Log::Dispatch::Email::Mailer - Log::Dispatch::Email subclass that sends mail using Email::Mailer
  - Log::Dispatch::TAP - Log to TAP output
  - Log::Dispatch::UnixSyslog - Log events to syslog with Unix::Syslog
  - Log::Dispatch::WarnDie - Log standard Perl warnings and errors
  - Log::Dispatch::XML - Collect one or more messages in XML format
  - Log::Dispatchouli - A simple wrapper around Log::Dispatch
  - ⊕ Notes for Log::Dispatchouli
    - Contains Log::Fmt, etc
  - Log::Fmt::XS - XS components to speed up Log::Fmt
  - Log::Handler - Log messages to several outputs
  - ⊕ Notes for Log::Handler
    - This is my favourite
  - Log::Handler::Plugin::DBI - A plugin for Log::Handler using Log::Hander::Output::DBI
  - Log::JSON::Lines - Log in JSONLines format
  - ⊕ Notes for Log::JSON::Lines
    - https://jsonlines.org
  - Log::Journald - Send messages to a systemd journal
  - Log::Log4perl - Log4j implementation for Perl
  - ⊕ Notes for Log::Log4perl
    - Warning: Use this if you want maximum complexity in your code
  - Log::Log4perl::Appender::AmazonSES - Send via Amazon SES (SMTP over TLS)
  - Log::Log4perl::Appender::TAP - Append to TAP output
  - Log::Log4perl::Config::YamlConfigurator - Reads Log4perl YAML configurations
  - Log::LogMethods - Writes your logging code for you!
  - Log::Mini - It's a very simple logger which can log your messages to a file or STDERR
  - Log::Report - Report a problem, with exceptions and translation support
  - Log::Report::Lexicon - Translation component of Log::Report
  - Log::Report::Optional - Pick Log::Report or ::Minimal
  - Log::Report::Template - Template Toolkit with translations
  - Log::Syslog::Constants - Contains syslog priority constants as defined in RFC3164
  - ⊕ Notes for Log::Syslog::Constants
    - See TheRFCGuide for rfc3164
  - Log::Syslog::Fast - Send syslog messages over TCP, UDP, or UNIX sockets with minimal CPU overhead
  - Log::Timer - Track nested timing information
  - Log::WarnDie - Log standard Perl warnings and errors on a log handler
  - LWP::ConsoleLogger - LWP tracing and debugging
  - LWP::CurlLog - Log LWP::UserAgent / HTTP::Tiny requests as curl commands
  - No::Worries::Log - Logging without worries
  - No::Worries::Syslog - Syslog handling without worries
  - Parse::Syslog::Line - Simple syslog line parser
  - Readonly::Values::Syslog - Syslog Constants
  - Sys::Syslog - Perl interface to the UNIX syslog(3) calls
  - SyslogScan::Daemon - Watch log files
  - SyslogScan::Daemon::BlacklistDetector - Notice when a mail server has been blacklisted
  - SyslogScan::Daemon::SpamDetector - Notice spammers in the log files
- MarkdownHandling
  - ⊕ See also
    - App::oaf
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Pithub::Markdown
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://asciidoc.org/
    - An essay from UltraEdit
    - https://commonmark.org/
    - https://css-tricks.com/making-mermaid-diagrams-in-markdown/
    - https://daringfireball.net/projects/markdown/
    - https://docs.github.com/en/rest/markdown?apiVersion=2022-11-28
    - https://github.github.com/gfm/
    - https://github.com/markdown-it/markdown-it
    - https://metacpan.org/pod/CommonMark
    - https://metacpan.org/pod/Markdown::Perl
    - For a review of Perl markdown modules
    - For Discount (in C)
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Specifications and Tutorials - http://neilb.org/reviews/markdown.html
  - ⊕ Notes for Specifications and Tutorials
    - https://metacpan.org/pod/Text::MultiMarkdown
    - https://fletcherpenney.net/multimarkdown/
    - https://www.markdowntutorial.com/
  - App::Greple::md - Greple module for Markdown syntax highlighting
  - App::md2html - Blah blah blah
  - App::mdee - Markdown, Easy on the Eyes
  - Chandra::Markdown - Render Markdown in Chandra apps
  - CommonMark - Interface to the CommonMark C library
  - Liveman - Compiler from Markdown to tests and documentation
  - Markdent - An event-based Markdown parser toolkit
  - Markdent::Dialect::GitHub - Markdown extensions implemented on GitHub
  - Markdown::ODF - Create ODF documents from Markdown
  - Markdown::Parser - Markdown Parser Only
  - Markdown::Perl - Very configurable Markdown processor written in pure Perl, supporting the CommonMark spec and many extensions
  - Markdown::Render - Render markdown as HTML
  - Markdown::Simple - Markdown to HTML converter
  - ⊕ Notes for Markdown::Simple
    - Code generated by co-pilot
    - Uses XS
  - mdcat - Fancy cat for Markdown (that is, CommonMark)
  - ⊕ Notes for mdcat
    - Release binaries: https://github.com/swsnr/mdcat/releases/
    - An add-on which generates docs from code comments: https://github.com/EvanCarroll/p5-doc-comments
  - Mermaid - Mermaid is a JavaScript based diagramming and charting tool that takes Markdown-inspired text definitions and creates diagrams dynamically in the browser
  - ⊕ Notes for Mermaid
    - Warning: It outputs to an iFrame within your browser
  - Regexp::Common::Markdown - Markdown Common Regular Expressions
  - ⊕ Notes for Regexp::Common::Markdown
    - Used by Markdown::Parser
  - Term::ANSIEncode - A markup language to generate basic ANSI text
  - Text::HTML::Turndown - Convert HTML to Markdown
  - Text::Markdown - Convert Markdown syntax to (X)HTML. Buggy
  - Text::MarkdownAdoc - Convert Markdown (GFM + kramdown) to AsciiDoc
  - Text::Markdown::Discount - Fast function for converting markdown to HTML (requires C compiler)
  - Text::Markdown::Hoedown - Hoedown for Perl5
  - ⊕ Notes for Text::Markdown::Hoedown
    - https://github.com/hoedown/hoedown
  - Text::Markup - Parse text markup into HTML
  - ⊕ Notes for Text::Markup
    - This distribution includes support for 15 markup formats
  - Text::Markup::Asciidoc - Asciidoc parser for Text::Markup
  - Text::MultiMarkdown - Convert MultiMarkdown syntax to (X)HTML
- MarlinStuff
  - ⊕ See also
    - [Topic]
  - Marlin - ð Pretty fast class builder with most Moo/Moose features ð
  - Marlin::Antlers - A more Moose-like syntax for Marlin
  - Marlin::X::Clone - Marlin extension to add a clone method to your class
  - Marlin::X::ToHash - Marlin extension to add a to_hash method to your class
  - Marlin::X::UndefTolerant - Marlin extension to make your constructor forgive undefs
  - Marlin::XAttribute::LocalWriter - Marlin attribute extension for localizing attribute values
  - Marlin::XAttribute::Lvalue - Marlin attribute extension for lvalue accessors
- Marpa
  - ⊕ See also
  - GraphViz2 - A wrapper for AT&T's Graphviz
  - GraphViz2::Marpa - A Marpa-based parser for Graphviz dot files
  - GraphViz2::Marpa::Extractor - Extracts a simplified AST from GraphViz2::Marpa tree
  - GraphViz2::Marpa::PathUtils - Provide various analyses of Graphviz dot files
  - JSON::Pointer::Marpa - Marpa::R2 based JSON Pointer RFC6901 implementation
  - ⊕ Notes for JSON::Pointer::Marpa
    - See TheRFCGuide for rfc6901
    - JSON Pointer identifies a specified value within a JSON document, and is similar to XPath
  - Marpa::R2 - Release 2 of Marpa
  - MarpaX::Grammar::GraphViz2 - Convert a Marpa grammar into an image
  - MarpaX::Grammar::Parser - Converts a Marpa grammar into a tree using Tree::DAG_Node
  - MarpaX::Languages::Dash - A Marpa-based parser for the DASH language
  - MarpaX::Languages::SVG::Parser - A nested SVG parser, using XML::SAX and Marpa::R2
  - Unicode bracketing - https://www.unicode.org/notes/tn39/
- MathsLibraries
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For the Octave Manual
    - for Bit
    - For the GNU Linear Programming Kit
    - https://xlattice.sourceforge.net/components/protocol/kademlia/specs.html
  - Alien::Bit - Find or install the Bit library
  - Alien::Qhull - Build and Install the Qhull library
  - Algorithm::Combinatorics - Efficient generation of combinatorial sequences
  - Algorithm::Kademlia - Pure Perl implementation of the Kademlia DHT algorithm
  - Algorithm::Loops - Looping constructs: NestedLoops, MapCar*, Filter, and NextPermute*
  - Algorithm::FastPermute - Rapid generation of permutations
  - Algorithm::Permute - Handy and fast permutation with object oriented interface
  - Algorithm::TimelinePacking - Arrange time intervals into non-overlapping lines
  - App::ArithmeticsUtils - Utilities related to arithmetics
  - App::GUI::Cellgraph - Draw pattern by cellular automata
  - App::GUI::Harmonograph - Sculpting beautiful circular drawings
  - App::GUI::Juliagraph - Drawing Mandelbrot and Julia fractals
  - bigint - Transparent big integer support for Perl
  - ⊕ Notes for bigint
    - Contains bigfloat, bigint, bignum, bigrat
  - Bijection - Bijection of an integer
  - Bijection::XS - Bijection of an integer faster
  - Bit::Set - Perl interface for bitset functions from the 'bit' C library
  - Bit::Vector - Efficient bit vector, set of integers and "big int" math library
  - ⊕ Notes for Bit::Vector
    - If true & false are a problem, see https://blogs.perl.org/users/dean/2026/05/installing-bitvector-on-debian-13-trixie.html
  - List::PowerSet - Generate the power set of a list
  - Math::AnyNum - Arbitrary size precision for integers, rationals, floating-points and complex numbers
  - Math::BaseCalc - Convert numbers between various bases
  - Math::Base::Convert - Very fast base to base conversion
  - ⊕ Notes for Math::Base::Convert
    - See also Math::BaseConvert below
  - Math::BaseConvert - Fast functions to CoNVert between number Bases
  - ⊕ Notes for Math::BaseConvert
    - See also Math::Base::Convert above
  - Math::Basic - Basic math
  - Math::Basic::XS - The great new Math::Basic::XS!
  - Math::BigInt - Arbitrary size integer math package
  - ⊕ Notes for Math::BigInt
    - Contains Math::BigFloat and Math::BigRat etc
  - Math::BigInt::BitVect - A math backend library based on Bit::Vector
  - Math::BigInt::FastCalc - Math::BigInt::Calc with some XS for more speed
  - Math::BigInt::GMP - Backend library for Math::BigInt etc. based on GMP
  - Math::BigInt::GMPz - A math backend library based on Math::GMPz
  - Math::BigInt::Lite - What Math::BigInts are before they become big
  - Math::BigInt::Pari - A math backend library based on Math::Pari
  - Math::BigRat - Arbitrary size rational number math package
  - Math::Cephes - Perl interface to the cephes math library
  - Math::Complex - Complex numbers and associated mathematical functions
  - Math::FakeBfloat16 - Emulate bf16 floating point arithmetic
  - Math::FakeDD - DoubleDouble precision arithmetic for all architectures
  - Math::FakeFloat16 - Emulate _Float16 floating point arithmetic.
  - Math::BigFloat - Arbitrary size floating point math package
  - Math::Cartesian::Product - Generate the Cartesian product of zero or more lists
  - Math::Combinatorics - Perform combinations and permutations on lists
  - Math::Disarrange::List - Generate all the disarrangements of a list
  - Math::Float32 - Perl interface to float (aka _Float32) floating point type
  - Math::Formula - Expressions on steroids
  - Math::GMatrix - Extension of Math::Matrix for (2D graphics-)vector manipulation
  - Math::GMP - High speed arbitrary size integer math
  - Math::GMPf - Perl interface to the GMP library's floating point (mpf) functions
  - Math::GMPq - Perl interface to the GMP library's rational (mpq) functions
  - Math::GMPn - Fixed length integer arithmetic
  - Math::GMPz - Perl interface to the GMP library's integer (mpz) functions
  - Math::GMP_OLOAD - Assist in the overloading of Math::GMP objects
  - Math::GSL::Alien - Easy installation of the GSL library
  - ⊕ Notes for Math::GSL::Alien
    - GSL means Gnu Scientific Library
    - It has a See Also section
  - Math::Int128 - Manipulate 128 bits integers in Perl
  - Math::Int64 - Manipulate 64 bits integers in Perl
  - Math::Int64::C_API::Sample - C API Usage sample for Math::Int64
  - Math::Interpolator - Interpolate between lazily-evaluated points
  - Math::MPC - Perl interface to the MPC (multi precision complex) library
  - Math::MPFI - Perl interface to the MPFI (interval arithmetic) library
  - Math::MPFR - Perl interface to the MPFR (floating point) library.
  - Math::NLopt - Math::NLopt - Perl interface to the NLopt optimization library
  - Math::Pari - Perl interface to PARI
  - Math::Permute::List - Generate all permutations of a list
  - Math::Permute::Lists - Generate all the permutations of zero or more nested lists
  - Math::Permute::Partitions - Generate all the permutations of a partitioned list.
  - Math::Permutation - Pure Perl implementation of functions related to the permutations
  - Math::PlanePath - Points on a path through the 2-D plane
  - Math::Polygon - Class for maintaining polygon data
  - Math::Polynomial - Perl class for polynomials in one variable
  - Math::Polynomial::Solve - Find the roots of polynomial equations
  - Math::Prime::FastSieve - Generate a list of all primes less than or equal to $n
  - Math::Prime::Util - Utilities related to prime numbers, including fast sieves and factoring
  - Math::Prime::Util::GMP - Utilities related to prime numbers and factoring, using GMP
  - Math::ReedSolomon::Encoder - Calculate Reed-Solomon Error Correction Codes
  - Math::Round - Perl extension for rounding numbers
  - Math::RPN - Perl extension for Reverse Polish Math Expression Evaluation
  - Math::SigFigs - Do math with correct handling of significant figures
  - Math::Subsets::List - Generate all the subsets of a list
  - Math::Symbolic - Symbolic calculations
  - ⊕ Notes for Math::Symbolic
    - This module comes with a huge list of modules
  - Math::Symbolic::Custom::Factor - Re-arrange a Math::Symbolic expression into a product of factors
  - Math::Symbolic::Custom::Collect - Collect up Math::Symbolic expressions
  - Math::Symbolic::Custom::CollectSimplify - Simplify Math::Symbolic expressions using Math::Symbolic::Custom::Collect
  - Math::Symbolic::Custom::Equation - Work with equations of Math::Symbolic expressions
  - Math::Symbolic::Custom::Matrix - Matrix routines for Math::Symbolic
  - Math::Symbolic::Custom::Polynomial - Polynomial routines for Math::Symbolic
  - Math::Symbolic::Custom::ToShorterString - Shorter string representations of Math::Symbolic trees
  - Math::Symbolic::Custom::ToTallString - Pretty-print Math::Symbolic expressions
  - Math::Transform::List - Generate specified transformations of a list
  - Math::Trig - Trigonometric functions
  - Math::Vector::Similarity - Cosine similarity, euclidean distance and other vector comparison functions
  - Math::VectorReal - Module to handle 3D Vector Mathematics
  - Number::AnyBase - Converts decimals to and from any alphabet of any size (for shortening IDs, URLs etc.)
  - Number::Equation - Track how a number is calculated progammatically
  - Number::Equation::XS - Track how a number is calculated progammatically
  - Number::Fraction - Perl extension to model fractions
  - Numeric::Matrix - SIMD-accelerated 2D matrices with BLAS GEMM
  - Numeric::Vector - SIMD-accelerated numeric vectors
  - Parse::RPN - A minimalist RPN parser/processor (a little like FORTH)
  - PERLANCAR::Permute::Named - Permute multiple-valued key-value pairs
  - Permute::Named - Permute multiple-valued key-value pairs
  - Permute::Named::Iter - Permute multiple-valued key-value pairs
  - Permute::Unnamed - Permute multiple-valued lists
  - Permute::Unnamed::Iter - Permute multiple-valued lists
  - Qhull - Interface to the Qhull convex hull, Delauny triangulation, Voronoi diagram software suite
  - Shannon::Entropy - Calculate the Shannon entropy H of a given input string
  - Shannon::Entropy::XS - Calculate the Shannon entropy H of a given input string faster
  - smallnum - Transparent "SmallNumber" support for Perl
  - smallnum::XS - Faster transparent "SmallNumber" support for Perl
  - uinteger - Like "use integer", but unsigned
- MeasureMetrics
  - ⊕ See also
    - [Topic]
    - Query, visualize, alert on, and explore your metrics, logs, and traces wherever they are stored
    - InfluxDB
    - Time Series
    - Perl application observability platform
    - StatsD Metrics Export Specification
    - Telegraf
  - Devel::Cover - Code coverage metrics for Perl
  - Devel::Cover::Report::Codecovbash - Generate a JSON file to be uploaded with the codecov bash script
  - Grafana - Is an open-source analytics and visualisation platform. It lets you create dashboards that visualise data from various sources
  - ⊕ Notes for Grafana
    - https://theweeklychallenge.org/blog/grafana-prometheus/ - For sample code
  - Lab::Measurement::Manual - API documentation manual for Lab::Measurement
  - ⊕ Notes for Lab::Measurement::Manual
    - Lab::Measurement is a huge package with support for many types of hardware
  - Linux::Statm::Tiny - Simple access to Linux /proc/../statm
  - Metrics::Any - Abstract collection of monitoring metrics
  - Metrics::Any::Adapter::Prometheus - A metrics reporting adapter for Prometheus
  - Metrics::Any::Adapter::Statsd - A metrics reporting adapter for statsd
  - Measure::Everything - Log::Any for Stats
  - Net::Async::Statsd - Asynchronous API for Etsy's statsd protocol
  - Net::Prometheus - Export monitoring metrics for prometheus
  - Net::Statsd - Perl client for Etsy's statsd daemon
  - ⊕ Notes for Net::Statsd
    - This module was forked from Net::Statsd::Tiny
  - Net::Statsd::Lite - A lightweight StatsD client that supports multimetric packets
  - Net::Statsd::Tiny - A tiny StatsD client that supports multimetric packets
  - Perl::Metrics::Halstead - Compute Halstead complexity metrics
  - ⊕ Notes for Perl::Metrics::Halstead
    - https://ology.github.io/2019/03/19/halstead-software-complexity-of-perl-code/
  - Prometheus - Is an open-source systems monitoring and alerting toolkit
  - ⊕ Notes for Prometheus
    - https://theweeklychallenge.org/blog/grafana-prometheus/ - For sample code
  - SlapbirdAPM::Agent::Dancer2 - The SlapbirdAPM user-agent for Dancer2/Mojo/Plack applications
  - Time::Progress - Elapsed and estimated finish time reporting
- MemoryUsage
  - Devel::Size - Perl extension for finding the memory usage of Perl variables
  - File::Map - Memory mapping made simple and safe
  - ⊕ Notes for File::Map
    - Contains map_anonymous (for when your processes have a parent-child relationship)
  - Linux::Smaps - A Perl interface to /proc/PID/smaps
  - Linux::Smaps::Tiny - A minimal and fast alternative to Linux::Smaps
  - Memory::Usage - Tools to determine actual memory usage
  - Memchmark - Check memory consumption
  - SysV::SharedMem - SysV Shared memory made easy
  - ⊕ Notes for SysV::SharedMem
    - But see the caveats discussed in https://metacpan.org/pod/POSIX::RT::SharedMem
  - Task::MemManager - A memory allocated and manager for low level code in Perl
  - Task::MemManager::CMalloc - Allocates buffers using C's malloc
  - Task::MemManager::Device - Device-specific memory management extensions for Task::MemManager
  - Task::MemManager::View - Provides convenient views for Task::MemManager buffers
  - Task::MemManager::View::PDL - Create PDL views of Task::MemManager buffers
- MobilePhones
  - ⊕ See also
    - Android Debug Bridge is a versatile command-line tool that lets you communicate with a device
    - https://librephone.fsf.org/
  - Android::ElectricSheep::Automator - Do Androids Dream of Electric Sheep? Smartphone control from your desktop
  - HTML::Make::Page - Automate making HTML tags 'head' and 'body'
- ModernPerl
  - Modern::Perl - Enable all of the features of Modern Perl with one import
  - ⊕ Notes for Modern::Perl
    - Usage: use Modern::Perl '2024';
    - But V 1.20250607 says: Enhance documentation to discourage this module for v5.38 and newer
  - Modern::Perl::Prelude - Project prelude for modern Perl style on Perl 5.30+
- ModuleBuilding
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Jargon alert - Class aka OO aka Object Orientated
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - WeirdAndWonderful = For Ancient, a collection of utilities
    - [Topic]
    - https://blogs.perl.org/users/dean/2026/03/shipping-a-perl-cli-as-a-single-file-with-appfatpacker.html
    - For tcc
    - Read this first
    - For infix
    - https://github.com/Perl/PPCs/blob/main/ppcs/ppc0022-metaprogramming.md
    - For Wslay
    - https://libwebsockets.org/
    - MetaCPAN's list of recent Perl module releases
    - For RPerl
    - For Beam::Wire
    - http://www.dsmit.com/cons/
    - https://www.sqlite.org/cli.html
  - Acme::AutoLoad - Automatically load uninstalled CPAN modules on the fly
  - Acme::Damn - 'Unbless' Perl objects
  - Acme::ExtUtils::XSOne::Test::Calculator - A scientific calculator demonstrating ExtUtils::XSOne
  - Acme::Intraweb - Allows you to use modules not yet installed on your system
  - Affix - A Foreign Function Interface eXtension
  - Aion - A postmodern object system for Perl 5, such as âMouseâ, âMooseâ, âMooâ, âMoâ and âMâ, but with improvements
  - Aion::Fs - Utilities for the file system: reading, writing, searching, replacing files, etc
  - aliased - Use shorter versions of class names
  - Alien - External libraries wrapped up for your viewing pleasure!
  - Alien::Base - Base classes for Alien:: modules
  - Alien::Base::ModuleBuild - A Module::Build subclass for building Alien:: modules and their libraries
  - Alien::Build - Build external dependencies for use in CPAN
  - ⊕ Notes for Alien::Build
    - This module contains a huge list of plugins, including Alien::Base
  - Alien::Build::Plugin::Build::CMake - CMake plugin for Alien::Build
  - Alien::CMake - Build and make available CMake library - http://cmake.org/
  - Alien::cmake3 - Find or download or build cmake 3
  - Alien::cmake4 - Find or download or build cmake 4
  - ⊕ Notes for Alien::cmake4
    - Contains an important See also
  - Alien::DuckDB - Find or build DuckDB
  - ⊕ Notes for Alien::DuckDB
    - See also FFI::Platypus::Record below
  - Alien::fpm - Convert directories, rpms, python eggs, rubygems, and more to rpms, debs, solaris packages and more
  - Alien::libwebsockets - Find or build libwebsockets C library
  - Alien::libui - Build and Install libui: A portable GUI library
  - Alien::TinyCC - Retrieve useful information about the Alien installation of tcc
  - Alien::TinyCCx - Retrieve useful information about the Alien installation of tcc with extended symbol tables
  - Alien::Wslay - Discover or download and install Wslay
  - ⊕ Notes for Alien::Wslay
    - Wslay is a WebSocket library written in C. It implements the protocol version 13 described in RFC 6455
    - See also Net::WebSocket::EVx below
  - Alien::Xmake - Locate, Download, or Build and Install Xmake
  - Alt - Alternate Module Implementations
  - App::codefork - Worlds dumbest code forker
  - App::cpanminus - Get, unpack, build and install modules from CPAN
  - App::cpanminus::reporter - Send cpanm output to CPAN Testers
  - App::cpanoutdated - Detect outdated CPAN modules in your environmen
  - ⊕ Notes for App::cpanoutdated
    - Installs cpan-outdated
  - App::depak - Pack dependencies onto your script file
  - ⊕ Notes for App::depak
    - See also App::FatPacker::Simple
  - App::DualLivedList - Perl extension to determine if a module is Dual-Lived
  - App::FatPacker - Pack your dependencies onto your script file
  - App::FatPacker::Simple - Only fatpack a script
  - App::hopen - hopen build system command-line interface
  - App::LintPrereqs - Check extraneous/missing/incorrect prerequisites in dist.ini
  - App::ModuleBuildTiny - A standalone authoring tool for Module::Build::Tiny and Dist::Build
  - ⊕ Notes for App::ModuleBuildTiny
    - Can update version #s and push to CPAN
    - See also Module::Build::Tiny
    - Leon's articles
    - https://blogs.perl.org/users/leon_timmermans/2025/03/an-introduction-to-appmodulebuildtiny-part-1-setting-things-up.html
    - https://blogs.perl.org/users/leon_timmermans/2025/03/an-introduction-to-appmodulebuildtiny-part-2-authoring.html
  - App::Module::Lister - List the Perl modules in @INC
  - App::newver - Scan upstream for new software versions
  - App::perlimports - Make implicit imports explicit
  - App::PerlPackage2PlantUMLClassDiagram - Generate Plant UML's class diagraom from Perl packages
  - App::PP::Autolink - Run the pp (PAR Packager) utility while automatically finding dynamic libs to link
  - App::prepare4release - Prepare a Perl distribution for release (skeleton)
  - App::PrereqGrapher - Generate dependency graph using Perl::PrereqScanner
  - App::Project::Doctor - Unified pre-release health check for Perl CPAN distributions
  - App::ThisDist - Print Perl {distribution,module,author,...} associated with current directory
  - Aspect - Aspect-Oriented Programming (AOP) for Perl
  - Assert::Conditional - Conditionally-compiled code assertions
  - authority - Loads a module only if it has a particular authority
  - autovivification - Lexically disable autovivification
  - B::CallChecker - Custom B-based op checking for subroutines
  - ⊕ Notes for B::CallChecker
    - See also Devel::CallParser
  - B::LintSubs - Perl compiler backend to check sub linkage
  - Badger - Perl Application Programming Toolkit
  - bareword::filehandles - Disables bareword filehandles
  - base - Establish an ISA relationship with base classes at compile time
  - Blessed::Merge - Merge Blessed Refs
  - BsDiPa - Create or apply binary difference patch
  - C::Blocks - Embedding a fast C compiler directly into your Perl parser
  - C::DynaLib - Dynamic Perl interface to C compiled code
  - C::TCC - An interface to the TCC(Tiny C Compiler)
  - C::TinyCompiler - Full C JIT compiling using the Tiny C Compiler
  - C::Tokenize - Reduce a C file to a series of tokens
  - CallBackery - Appliance Frontend Builder
  - Caller::Reverse - Reverse the caller stack
  - Class::Abstract - Enforce abstract (non-instantiable) base classes for plain-Perl OO
  - Class::Accessor - Automated accessor generation
  - Class::Accessor::Fast - Faster, but less expandable, accessors
  - Class::Accessor::Lite - A minimalistic variant of Class::Accessor
  - Class::Accessor::Validated - Drop-in constructor validation for Class::Accessor::Fast-based classes
  - Class::Autouse - Run-time load a class the first time you call a method in it.
  - Class::EHierarchy - This is intended for use as a base class for objects that need support for class or object hierarchies
  - ⊕ Notes for Class::EHierarchy
    - See also https://metacpan.org/pod/Parse::PlainConfig
  - Class::Inspector - Get information about a class and its structure
  - Class::Mite - A minimal, integrated Class and Role system for Perl
  - Class::MOP::Class - Class Meta Object
  - ⊕ Notes for Class::MOP::Class
    - See also Class::MOP::Module, Class::MOP::Package
  - Class::MOP::Module - Module Meta Object
  - ⊕ Notes for Class::MOP::Module
    - See also Class::MOP::Class, Class::MOP::Package
  - Class::MOP::Package - Package Meta Object
  - ⊕ Notes for Class::MOP::Package
    - See also Class::MOP::Class, Class::MOP::Module
  - Class::SingletonMethod - Extend individual objects with additional methods
  - Class::Tiny - Minimalist class construction
  - Class::Unload - Unload a class
  - Class::XSAccessor - Generate fast XS accessors without runtime compilation
  - Class::XSAccessor::Array - Generate fast XS accessors without runtime compilation
  - Class::XSConstructor - A super-fast (but limited) constructor in XS
  - common::sense - Save a tree AND a kitten, use common::sense!
  - Compiler::Lexer - Lexical Analyzer for Perl5
  - Cons - A Software Construction System
  - Contextual::Return - Create context-sensitive return values
  - cpan2rpm - A Perl module packager
  - CPAN::API::BuildPL - Documentation of the API for using Build.PL
  - CPAN::Meta - The distribution metadata for a CPAN dist
  - CPAN::Meta::Check - Verify requirements in a CPAN::Meta object
  - CPAN::Meta::Requirements - A set of version requirements for a CPAN dist
  - CPAN::Meta::YAML - Read and write a subset of YAML for CPAN Meta files
  - CPAN::Requirements::Dynamic - Dynamic prerequisites in meta files
  - CPAN::Static::Install - Static CPAN installation reference implementation
  - CPAN::Static::Spec - Static install specification for CPAN distributions
  - DBIx::Class::DeploymentHandler - Extensible DBIx::Class deployment
  - DBIx::Class::DynamicSubclass - Convenient way to use dynamic subclassing
  - DBIx::VersionedSubs - All your code are belong into the DB
  - Destructure::Declare - Lexically scoped structural destructuring let
  - Dev::Util - Base modules for Perl Development
  - Devel::AssertOS - Require that we are running on a particular OS
  - Devel::CheckLib - Check that a library is available
  - Devel::CheckOS - Check what OS we're running on
  - Devel::FindPerl - Find the path to your perl
  - Devel::Hide - Forces the unavailability of specified Perl modules (for testing)
  - ⊕ Notes for Devel::Hide
    - See also Test::Without::Module
  - Devel::Hook - Mess around with BEGIN/CHECK/INIT/END blocks
  - Devel::MaintBlead - Handle maint / blead code paths for distributions
  - Devel::OverrideGlobalRequire - Override CORE::GLOBAL::require safely
  - Devel::PPPort - Perl/Pollution/Portability
  - Devel::Required - Automatic update of required modules documentation
  - Devel::ThreadsForks - Check for availability of threads or forks
  - Developer::Dashboard - A local home for development work
  - Dios - Declarative Inside-Out Syntax
  - Dist::Build - A modern module builder, author tools not included!
  - Dist::Build::DynamicPrereqs - Support dynamic prerequisites in Dist::Build
  - Dist::Mgr - Automation for Perl distribution creation, integration, pre-release, release and post-release tasks
  - DynaLoader - Dynamically load C libraries into Perl code
  - ⊕ Notes for DynaLoader
    - See also XSLoader
  - English - Use nice English (or awk) names for ugly punctuation variables
  - English::Script - Parse English subset and convert to data or code
  - Eval::Closure - Safely and cleanly create closures via string eval
  - Export::These - Terse Module Configuration and Symbol (Re)Exporting
  - Export::XS - Replacement for Exporter.pm + const.pm in XS, with C++ API
  - Exporter - Implements default import method for modules
  - Exporter::Almighty - Combining Exporter::Tiny with some other stuff for added power
  - Exporter::Lexical - Exporter for lexical subs
  - Exporter::Tiny - An exporter with the features of Sub::Exporter but only core dependencies
  - ⊕ Notes for Exporter::Tiny
    - Includes Exporter::Shiny
  - ExtUtils::Builder - An overview of the foundations of the ExtUtils::Builder Plan framework
  - ExtUtils::Builder::Compiler - An interface around different compilers
  - ExtUtils::CBuilder - Compile and link C code for Perl modules
  - ExtUtils::CChecker - Configure-time utilities for using C headers, libraries, or OS features
  - ExtUtils::CFeatureTest - Test a host for available C language features and libraries
  - ExtUtils::Config - A wrapper for perl's configuration
  - ExtUtils::CppGuess - Guess C++ compiler and flags
  - ExtUtils::Depends - Easily build XS extensions that depend on XS extensions
  - ExtUtils::HasCompiler - Check for the presence of a compiler
  - ExtUtils::Helpers - Various portability utilities for module builders
  - ExtUtils::InstallPaths - Build.PL install path logic made easy
  - ExtUtils::MakeMaker - Create a module Makefile
  - ExtUtils::MakeMaker::CPANfile - Cpanfile support for EUMM
  - ExtUtils::MakeMaker::FAQ - Beware directives INSTALL_BASE and PREFIX
  - ExtUtils::ParseXS - Converts Perl XS code into C code
  - ExtUtils::PkgConfig - Simplistic interface to pkg-config
  - ⊕ Notes for ExtUtils::PkgConfig
    - But see Alien::libtickit
  - ExtUtils::Typemaps::Misc - A collection of miscelaneous typemap templates
  - ExtUtils::XSOne - Combine multiple XS files into a single shared library
  - ExtUtils::XSpp - XS for C++
  - Factory::Sub - Generate a factory of subs
  - Faster - Do some things faster
  - Feature::Compat::Class - Make class syntax available
  - ⊕ Notes for Feature::Compat::Class
    - Probably prefer this to Object::Pad, but is not as featureful as the latter
  - Feature::Compat::Defer - Make defer syntax available
  - FFI::C::Stat - Object-oriented FFI interface to native stat and lstat
  - FFI::CheckLib - Check that a library is available for FFI
  - FFI::Platypus - Write Perl bindings to non-Perl libraries with FFI. No XS required
  - FFI::Platypus::Lang::V - Documentation and tools for using Platypus with the V programming language
  - FFI::Platypus::Lang::Zig - Documentation and tools for using Platypus with the Zig programming language
  - FFI::Platypus::Record - FFI support for structured records data
  - FFI::Raw - Perl bindings to the portable FFI library (libffi)
  - FFI::TinyCC - Tiny C Compiler for FFI
  - Function::Parameters - Define functions and methods with parameter lists ("subroutine signatures")
  - Glib::Object::Introspection - Dynamically create Perl language bindings
  - Hades - Less is more, more is less!
  - Hades::Realm::Exporter - Hades realm for Exporter
  - Hades::Realm::Import::Export - Hades realm for Import::Export
  - Hades::Realm::OO - Hades realm for object orientation
  - Hash::AsObject - Treat hashes as objects, with arbitrary accessors/mutators
  - ⊕ Notes for Hash::AsObject
    - But see Object::Adhoc
  - Hash::Objectify - Create objects from hashes on the fly
  - ⊕ Notes for Hash::Objectify
    - But see Object::Adhoc
  - Import::Box - Box up imports into an object or unified function.
  - Import::Into - Import packages into other packages
  - indirect - Lexically warn about using the indirect method call syntax
  - Inline - Write Perl Subroutines in Other Programming Languages
  - ⊕ Notes for Inline
    - https://metacpan.org/pod/Inline-Support
  - Inline::C - C Language Support for Inline
  - Inline::CPP - Write Perl subroutines and classes in C++
  - Inline::Java - Write Perl classes in Java.
  - Inline::Lua - Embed Lua and Fennel code in your Perl scripts
  - Inline::Module - Support for Inline-based CPAN Extension Modules
  - InlineX::CPP2XS - Convert from Inline C++ code to XS
  - JavonetPerlSdk - Javonet allows you to reference and use modules or packages written in many languages
  - JCM::Boilerplate - Default Boilerplate for Joelle Maslak's Code
  - LaunchDarkly::Server - Perl server side SDK for LaunchDarkly, a fancy release manager
  - ⊕ Notes for LaunchDarkly::Server
    - See https://launchdarkly.com/docs/sdk/server-side/c-c--
  - Lexical::Accessor - True private attributes for Moose/Moo/Mouse
  - Lexical::Import - Clean imports from package-exporting modules
  - lib::archive - Load pure-Perl modules directly from TAR archives
  - Long::Jump - Mechanism for returning to a specific point from a deeply nested stack
  - Medusa - Subroutine auditing via attributes
  - Medusa::XS - High-performance XS audit logging with the :Audit attribute
  - Meow - Object à¸^â¢ï»â¢^à¸ Orientation
  - meta - Meta-programming API
  - ⊕ Notes for meta
    - This package provides an API for metaprogramming; that is, allowing code to inspect or manipulate parts of its own program structure
  - Minilla - CPAN module authoring tool
  - ⊕ Notes for Minilla
    - Contains Minilla::Tutorial
  - Mite - Moose-like OO, fast to load, with zero dependencies
  - ⊕ Notes for Mite
    - Demo: https://metacpan.org/dist/Acme-Mitey-Cards
  - Module::Build - Build and install Perl modules
  - Module::Build::CleanInstall - Subclass of Module::Build which removes the old module before installing the new one
  - Module::Build::Convert - Makefile.PL to Build.PL converter
  - Module::Build::Tiny - A tiny replacement for Module::Build
  - ⊕ Notes for Module::Build::Tiny
    - But see App::ModuleBuildTiny
  - Module::CheckVersion - Check module (e.g. check latest version) with CPAN (or equivalent repo)
  - Module::CheckLatestVersion - Warn/die when a module is not the latest version
  - Module::ExtractUse - Find out what modules are used
  - ⊕ Notes for Module::ExtractUse
    - This is not Module::Extract::Use, below
  - Module::Extract::Use - Discover the modules a module explicitly uses
  - ⊕ Notes for Module::Extract::Use
    - This is not Module::ExtractUse, above
  - Module::Extract::VERSION - Extract a module version safely
  - Module::Load - Runtime require of both modules and files
  - Module::Features - Define features for modules
  - Module::Features::PluginSystem - Features of modules that generate text tables
  - Module::Find - Find and use installed modules in a (sub)category
  - Module::Generate - Assist with module generation
  - Module::Generic - Generic Module to inherit from
  - Module::Install - Standalone, extensible Perl module installer
  - Module::Install::AssertOS - A Module::Install extension to require that we are running on a particular OS
  - Module::List - Module 'directory' listing
  - ⊕ Notes for Module::List
    - The POD helpfully contains a long list of similar modules
  - Module::Manifest::Skip - MANIFEST.SKIP Manangement for Modules
  - Module::Patch - Patch package with a set of patches
  - Module::Release - Automate software releases
  - Module::Runtime - Runtime module handling
  - Module::Signature - Module signature file manipulation - Deprecated
  - ⊕ Notes for Module::Signature
    - See also Test::Signature in TestingHelp
  - Module::Starter - A simple starter kit for any module
  - ⊕ Notes for Module::Starter
    - See also Module::Starter::Plugin
  - Module::Starter::AddModule - Add a new module to a distribution
  - Module::Starter::Plugin - How Module::Starter plugins work
  - Module::Starter::Simple - A simple, comprehensive Module::Starter plugin
  - ⊕ Notes for Module::Starter::Simple
    - Part of Module::Starter
  - Module::Starter::Smart - A Module::Starter plugin for adding new modules into an existing distribution
  - ⊕ Notes for Module::Starter::Smart
    - See Module::Starter::AddModule
  - Module::Starter::PBP - Create a module as recommended in "Perl Best Practices"
  - Moo - Minimalist Object Orientation (with Moose compatibility)
  - ⊕ Notes for Moo
    - MooX::Press, which contains Zydeco::Lite
    - MooX::Pression
    - MooX::Singleton
  - Mooish::Base - Importer for Mooish classes
  - Mooish::AttributeBuilder - Build Mooish attribute definitions with less boilerplate
  - Moo::Role - Minimal Object Orientation support for Roles
  - Moonshine::Magic - d[ o_0 ]b - has, extends, lazy_components
  - MooseX::Declare - Declarative syntax for Moose - Deprecated
  - MooseX::XSConstructor - Glue between Moose and Class::XSConstructo
  - MooX::Keyword::Field - Field attributes that cannot be set via the constructor
  - MooX::LazierAttributes - Lazier Attributes
  - MooX::Private::Attribute - Private attributes
  - MooX::StrictConstructor - Make your Moo-based object constructors blow up on unknown attributes
  - MooX::Traits - Automatically apply roles at object creation time
  - MooX::TypeTiny - Optimized type checks for Moo + Type::Tiny
  - MooX::XSConstructor - Glue between Moo and Class::XSConstructor
  - MOP4Import::Declare - Boilerplate base class for Runnable Module
  - Mouse - Moose minus the antlers
  - MouseX::OO_Modulino - Turn your Mouse class into JSON-aware Object-Oriented Modulino
  - MouseX::SingletonMethod - Mouse with Singleton Method facility
  - MouseX::Traits - Automatically apply roles at object creation time
  - multidimensional - Disables multidimensional array emulation
  - Multiple, separate Perls - perlbrew --install-multi
  - namespace::allclean - Avoid imports all subroutines into your namespace
  - namespace::clean - Keep imports and functions out of your namespace
  - Nefarious - Wicked or criminal objects
  - Net::WebSocket::EVx - Perl wrapper around Wslay websocket library
  - ⊕ Notes for Net::WebSocket::EVx
    - See also Alien::Wslay above
  - noop - A no-operation function, optimized to a single custom op
  - No::Worries - Coding without worries
  - Object::Adhoc - Make objects without the hassle of defining a class first
  - ⊕ Notes for Object::Adhoc
    - POD contains an important See Also
  - Object::Anon - Create objects on the fly
  - Object::Configure - Runtime Configuration for an Object
  - ⊕ Notes for Object::Configure
    - Was called Class::Debug
  - Object::HashBase - Build hash based classes
  - Object::ID - A unique identifier for any object
  - Object::InsideOut - Comprehensive inside-out object support module
  - Object::InsideOut::Metadata - Introspection for Object::InsideOut classes
  - Object::Pad - This module is essentially the basis of Perl's new keyword 'class'!
  - ⊕ Notes for Object::Pad
    - A simple syntax for lexical field-based objects
    - https://metacpan.org/dist/Object-Pad/view/lib/Object/Pad/Guide/MigratingFromClassicalPerl.pod
  - Object::Proto - Objects with prototype chains
  - Object::Proto::Sugar - Moo-se-like syntax for Object::Proto
  - ODS - Object Data Store
  - Object::Extend - Add and override per-object methods
  - Object::Realize::Later - Delayed creation of objects
  - Object::Result - Allow subs to build and return objects on-the-fly
  - ⊕ Notes for Object::Result
    - But see Object::Adhoc
  - Object::Simple - Simplest class builder, Mojo::Base porting, fast and less memory
  - Object::Tap - Tap into a series of method calls to alter an object
  - Object::Util - A selection of utility methods that can be called on blessed objects
  - Package::Stash - Routines for manipulating stashes
  - Package::Subroutine - Minimalistic import/export and other util methods
  - Package::Variant - Parameterizable packages
  - PAR::Packer - PAR Packager
  - parent - Establish an ISA relationship with base classes at compile time
  - parent::versioned - Establish an ISA relationship with base classes at compile time, with version checking
  - Parse::H - A parser for C header files that calls the given subroutines when a symbol of a specified type is encountered
  - Perl::APIReference - Programmatically query the perlapi
  - Perl::OSType - Map Perl operating system names to generic types
  - Perl::PrereqScanner - A tool to scan your Perl code for its prerequisites
  - ⊕ Notes for Perl::PrereqScanner
    - Command-line tool: scan-perl-prereqs
    - See also App::PrereqGrapher
  - Perl::PrereqScanner::Lite - Lightweight Prereqs Scanner for Perl
  - Perl::PrereqScanner::NotQuiteLite - A tool to scan your Perl code for its prerequisites
  - Perl::Squish - Reduce Perl code to a few characters as possible
  - Perl::Strip - Reduce file size by stripping whitespace, comments, pod etc
  - Perlbrew - See http://savage.net.au/misc/Debian.Wiki.html for curl
  - PerlBuildSystem - Make replacement with rules written in perl
  - PerlX::Maybe - Return a pair only if they are both defined
  - ⊕ Notes for PerlX::Maybe
    - Ship with Syntax::Feature::Maybe
  - PerlX::Perform - Syntactic sugar for if (defined ...) { ... }
  - Perl7::Handy - Handy Perl7 scripting environment on Perl5
  - PPI::Dumper - Dumping of PDOM trees
  - Preproc::Tiny - Minimal stand-alone preprocessor for code generation using perl
  - Probe::Perl - Information about the currently running perl
  - Quiq - Class library for rapid development
  - ⊕ Notes for Quiq
    - POD in German
  - Role::Basic - Just roles. Nothing else
  - Role::Commons - Roles that can be commonly used, for the mutual benefit of all
  - ⊕ Notes for Role::Commons
    - Uses Moo::Role. See Role::TinyCommons below
  - Role::Commons::Authority - A class method indicating who published the package
  - Role::Commons::Tap - An object method which helps with chaining, inspired by Ruby
  - ⊕ Notes for Role::Commons::Tap
    - Part of Role::Commons
    - DO NOT USE THIS MODULE! Use Object::Tap or Object::Util instead
  - Role::Tiny - Roles: a nouvelle cuisine portion size slice of Moose
  - ⊕ Notes for Role::Tiny
    - Included in Role::Tiny::With
  - Role::TinyCommons - Roles that can be commonly used, for the mutual benefit of all
  - ⊕ Notes for Role::TinyCommons
    - Uses Role::Tiny. See Role::Commons
  - Role::TinyCommons::Iterator::Basic - A basic iterator
  - Role::TinyCommons::Iterator::Resettable - A resettable iterator
  - Role::Tiny::With - Neat interface for consumers of Role::Tiny roles
  - ⊕ Notes for Role::Tiny::With
    - Included in Role::Tiny
  - Safe - Compile and execute code in restricted compartments
  - Safe::Hole - Make a hole to the original main compartment in the Safe compartment
  - Safe::Isa - Call isa, can, does and DOES safely on things that may not be objects
  - Scalar::Andand - Guarded method invocation
  - Simple::Accessor - Very simple, light and powerful accessor
  - Simple::Tuple - Because tuples should be simple and simple to use!
  - Singleton::Method - Utility to define singleton methods
  - SourceCode::LineCounter::Perl - Count lines in Perl source code
  - Stefo - Compile Perl subs to optimized bytecode via optree walking
  - Sub::Abstract - Abstract (virtual) methods for plain-Perl OO
  - Sub::Delete - Perl module enabling one to delete subroutines
  - Sub::Identify - Retrieve names of code references
  - Sub::Mutate - Examination and modification of subroutines
  - Sub::Name - (Re)name a sub
  - Sub::Private - Private subroutines and methods
  - Sub::Protected - Enforce protected subroutine access (Java/C++ semantics)
  - Sub::Quote - Efficient generation of subroutines via string eval
  - Sub::Signatures - Use proper signatures for subroutines, including dispatching
  - Sub::StrictDecl - Detect undeclared subroutines in compilation
  - Sub::Uplevel - Apparently run a function in a higher stack frame
  - Sub::Util - A selection of utility subroutines for subs and CODE references
  - Sub::Versions - Subroutine versioning syntactic sugar
  - Subclass::Of - Import a magic subclass
  - syntax - Activate syntax extensions
  - Syntax::Construct - Explicitly state which non-feature constructs are used in the code
  - Syntax::Keyword::Wielding - Adds a "wielding" keyword to make it easier to call the same function or method multiple times
  - UNIVERSAL::AUTHORITY::Lexical - An AUTHORITY method for every class, within a lexical scope
  - URI::PackageURL - Perl extension for Package URL (aka "purl")
  - Venus - Standard Library
  - Xerarch - Introspection of a package
  - ⊕ Notes for Xerarch
    - List all methods, scalars, arrays, hashes and globs
  - XS::Framework - Framework for building C++ XS modules with shared code, typemaps and C++ perl API
  - XS::Install - ExtUtils::MakeMaker based module installer for XS modules
  - XS::JIT - Lightweight JIT compiler for XS code
  - XS::Manifesto - Shared XS modules manifesto
  - XS::TCC - Embed, wrap & compile C code in Perl without going to disk
  - XSLoader - Dynamically load C libraries into Perl code
  - ⊕ Notes for XSLoader
    - See also DynaLoader
  - YAOO - Yet Another Object Orientation
  - Zydeco - Jazz up your Perl
  - ⊕ Notes for Zydeco
    - http://zydeco.toby.ink/
    - http://blogs.perl.org/users/toby_inkster/2020/02/mooxpression-now-much-faster.html
    - Was Moox::Pression
- ModulePlugins
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Commandable - Utilities for commandline-based programs
  - ⊕ Notes for Commandable
    - Note that "commandline" does not necessarily mean "plain-text running in a terminal"
  - Keyword::Pluggable - Define new keywords in pure Perl
  - Module::Pluggable - Automatically give your module the ability to have plugins
  - Module::Pluggable::Object - Automatically give your module the ability to have plugins
  - next::XS - Replacement for next::method, performing very fast, and super::method (next-by-mro), with Perl and C++ interface
  - Plugins - Generic plugins framework
  - Plugins::API - Inter-plugin callback API
- MonkeyLanguage
  - ⊕ See also
    - [Topic]
  - Lang::Monkey - Monkey programming language
- MusicStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/Forte_number
    - https://en.wikipedia.org/wiki/Roman_numeral_analysis
    - https://github.com/ology/Music/blob/master/tones-together.pl
    - https://lilypond.org/
  - Alien::RtMidi - Install RtMidi
  - App::DrivePlayer - GTK3 music player for Google Drive
  - App::Music::ChordPro - A lyrics and chords formatting program
  - App-MusicTools - Command line utilities for music composition and analysis
  - Business::ISMN - Work with International Standard Music Numbers
  - idi - Easy, command-line MIDI
  - LyricFinder - Fetch song lyrics from several internet lyric sites
  - MIDI - Read, compose, modify, and write MIDI files
  - MIDI::Drummer::Tiny - Glorified metronome
  - MIDI::Event - MIDI events
  - MIDI::RtController - Control your MIDI controller
  - MIDI::RtController::Filter::CC - Control-change based RtController filters
  - MIDI::RtController::Filter::Tonal - Tonal RtController filters
  - MIDI::RtMidi::FFI - Bindings for librtmidi - Realtime MIDI library
  - MIDI::RtMidi::FFI::Device - OO interface for MIDI::RtMidi::FFI
  - MIDI::RtMidi::ScorePlayer - Play a MIDI score in real-time
  - MIDI::Simple - Procedural/OOP interface for MIDI composition
  - MIDI::Stream - MIDI bytestream decoding and encoding
  - MIDI::Util - MIDI Utilities
  - Music::AtonalUtil - Atonal music analysis and composition
  - Music::Canon - Routines for musical canon construction
  - Music::Chord::Note - Get Chord Tone List from Chord Name
  - Music::Chord::Positions - Generate various chord inversions and voicings
  - Music::Duration - Add 32nd, 64th, 128th and tuplet durations to MIDI-Perl
  - Music::Duration::Partition - Partition a musical duration into rhythmic phrases
  - Music::Drummer - Use MIDI::Drummer::Tiny
  - Music::Harmonica::TabsCreator - Convert tunes into harmonica tabs
  - Music::Interval::Barycentric - Compute barycentric musical interval space
  - Music::Intervals - Breakdown of musical intervals
  - Music::LilyPondUtil - Utility methods for lilypond data
  - Music::MelodicDevice::Arpeggiation - Apply arpeggiation patterns to groups of notes
  - Music::Note - Representation of a single musical note, and various manipulation routines
  - Music::PitchNum - Note name and pitch number utility roles
  - Music::Scala - Scala scale support for Perl
  - Music::Scales - Supply necessary notes / offsets for musical scales
  - Music::ScaleNote - Manipulate the position of a note in a scale
  - Music::SimpleDrumMachine - Simple 16th-note-phrase Drummer
  - Music::Tempo - Various conversions to and from BPM
  - Music::Tension - Music tension analysis
  - Music::Tension::Cope - Tension analysis for equal temperament music
  - Music::ToRoman - Convert notes and chords to Roman numeral notation
  - Music::VoiceGen - Musical voice generation
  - Music::VoicePhrase - Construct a measured phrase of notes
  - Seed::Audio::AI::SiteKit - Unofficial metadata and URL helpers for Seed Audio AI
  - Types::MIDI - Type library for MIDI
  - WebService::MusicBrainz - API to search the musicbrainz.org database
- NetworkProgramming
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/
    - https://github.com/netdisco/snmp-info/
    - https://metacpan.org/pod/perlipc#Bidirectional-Communication-with-Another-Process
    - http://netdisco.org/
    - For open source network analysis and threat detection
    - http://en.wikipedia.org/wiki/MAC_Address
  - Acme::UPnP - Cheap UPnP Port Mapping (IGD)
  - Alien::SNMP - Alien package for the Net-SNMP library
  - App::Netdisco - An open source web-based network management tool
  - App::NetdiscoX::Web::Plugin::Observium - Port Traffic Links and Thumbnail Graphs from Observium
  - App::ReslirpTunnel - A wrapper for the reslirp-tunnel application over SSH for remote connections
  - Check::NetworkSpans - See if bidirectional traffic is being seen on spans
  - Check::SuricataFlows - Make sure Suricata is seeing data via reading the Suricata flows json
  - Control::CLI - Command Line Interface I/O over either Telnet or SSH (IPv4 & IPv6) or Serial port
  - Control::CLI::Extreme - Interact with CLI of Extreme Networking products over any of Telnet, SSH or Serial port
  - Data::Throttler - Limit data throughput
  - Device::MAC - Handle hardware MAC Addresses (EUI-48 and EUI-64)
  - Device::OUI - Resolve an Organizationally Unique Identifier
  - Device::WWN - Encode/Decode Fiber Channel World Wide Names
  - FTN::Addr - Working with FTN addresses
  - Gearman::Client - Client for gearman distributed job system
  - Gearman::Objects - A parent class for Gearman::Client and Gearman::Worker
  - Gearman::Server - Function call "router" and load balancer
  - Gearman::Worker - Worker for gearman distributed job system
  - GraphQL - Perl implementation of GraphQL
  - GraphQL::Plugin::Convert - GraphQL plugin API abstract class
  - GraphQL::Plugin::Convert::DBIC - Convert DBIx::Class schema to GraphQL schema
  - GraphQL::Plugin::Convert::OpenAPI - Convert OpenAPI schema to GraphQL schema
  - grepcidr - Filter IPv4 and IPv6 addresses matching CIDR patterns
  - ⊕ Notes for grepcidr
    - See Acronyms
  - libnet - This is a collection of perl5 modules which all related to network programming
  - ⊕ Notes for libnet
    - The majority of the modules available provide the client side of popular server-client protocols
    - See also Net::LMTP2 below
  - Mnet - Testable network automation and reporting
  - NetAddr::IP - Manages IPv4 and IPv6 addresses and subnets
  - Net::BART - Balanced Routing Tables for IPv4 and IPv6
  - Net::CIDR::Lite - Perl extension for merging IPv4 or IPv6 CIDR addresses
  - Net::CIDR::Set - Manipulate sets of IP addresses
  - Net::DHCP - Object methods to create a DHCP packet
  - Net::DHCPv6 - DHCPv6 packet decoder/encoder
  - Net::EmptyPort - Find a free TCP/UDP port
  - Net::FTP - FTP Client class
  - Net::IP - Perl extension for manipulating IPv4/IPv6 addresses
  - Net::IP::XS - IPv4/IPv6 address library
  - Net::LMTP2 - A client class for the LMTP protocol which claims to fix Net::SMTP
  - ⊕ Notes for Net::LMTP2
    - See also libnet above
  - Net::MAC - Perl extension for representing and manipulating MAC addresses
  - Net::MacMap - A module used to determine the vendor of an interface based on the MAC addres
  - ⊕ Notes for Net::MacMap
    - But see the next module
  - Net::MAC::Vendor - Look up the vendor for a MAC
  - Net::Netmask - Parse, manipulate and lookup IP network blocks
  - Net::Nostr - Perl client and relay library for the Nostr protocol
  - Net::Nostr::Client - WebSocket client for Nostr relays
  - Net::Nostr::Core - Core Perl tooling for the Nostr protocol
  - Net::Nostr::Relay - Nostr WebSocket relay server
  - Net::Packet - A framework to easily send and receive frames from layer 2 to layer 7
  - Net::Patricia - Patricia Trie perl module for fast IP address lookups
  - Net::SIP - Framework SIP (Voice Over IP, RFC3261)
  - ⊕ Notes for Net::SIP
    - See TheRFCGuide for rfc321
  - Net::SNMP - Object oriented interface to SNMP
  - Net::SNMP::QueryEngine::AnyEvent - Multiplexing SNMP query engine client using AnyEvent
  - Net::UPnP - Perl extension for UPnP
  - Net::UPnP::AV::MediaServer - Perl extension for UPnP
  - Net::UPnP::ControlPoint - Perl extension for UPnP control point
  - Net::Versa::Director - Versa Director REST API client library
  - NetAddr::MAC - MAC hardware address functions and object (EUI48 and EUI64)
  - NetBox::API - Perl interface to NetBox API
  - ⊕ Notes for NetBox::API
    - https://netboxlabs.com/docs/netbox/
  - NetBox::Client - Perl5 interface to NetBox API
  - NetPacket::LACP - Assemble and disassemble IEEE 802.1D Spanning Tree protocol packets
  - NetPacket::LLC - Assemble and disassemble IEEE 802.3 LLC protocol packets
  - NetPacket::SpanningTree - Assemble and disassemble IEEE 802.1D Spanning Tree protocol packets
  - OSPF::LSDB - Class containing OSPF link state database
  - Ryu - Asynchronous Stream Building Blocks
  - ⊕ Notes for Ryu
    - Has good SEE ALSO
  - SNMP - The Perl5 'SNMP' Extension Module for the Net-SNMP SNMP package
  - SNMP::Info - OO Interface to Network devices and MIBs through SNMP
  - socat - Socat is a command line based utility that establishes two bidirectional byte streams and transfers data between them
  - Socket - Networking constants and support functions
- NewOperators
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Devel::Declare - Adding keywords to perl, in perl - Deprecated
  - Infix::Custom - Custom infix operators
  - Keyword::API - This module provides a pure perl interface for the keywords API added to the perl core in 5.12
  - Keyword::Declare - Declare new Perl keywords...via a keyword...named keyword
  - Keyword::Simple - Define new keywords in pure Perl
  - PerlX::SafeNav - Safe-navigation for Perl aka Optional Chaining
  - ⊕ Notes for PerlX::SafeNav
    - See also https://github.com/Perl/PPCs/blob/main/ppcs/ppc0021-optional-chaining-operator.md
  - List::Keywords - A selection of list utility keywords
  - ⊕ Notes for List::Keywords
    - first, all, any, none, notall, reduce, reductions, ngrep, nmap
  - Syntax::Feature::Loop - Provides the loop BLOCK syntax for unconditional loops
  - Syntax::Feature::Maybe - Use syntax qw/maybe/
  - ⊕ Notes for Syntax::Feature::Maybe
    - Included in PerlX::Maybe
  - Syntax::Feature::QwComments - Pragma to allow comments in qw()
  - Syntax::Feature::Void - Provides the void operator to force void context
  - Syntax::Feature::With - Simulate Pascal's "with" statement in Per
  - Syntax::Infix::ConditionalSplice - A short-circuiting < ?> operator for conditional list elements
  - Syntax::Infix::EqualityInsensitive - Case-insensitive eqi and nei infix operators
  - Syntax::Infix::OptionalChain - A safe-navigation < ?- >> operator for objects, hashes and arrays
  - Syntax::Keyword::Dynamically - Dynamically change the value of a variable
  - Syntax::Keyword::PhaserExpression - Phasers as arbitrary expressions rather than blocks
  - Syntax::Operator::Elem - Element-of-list operators
  - ⊕ Notes for Syntax::Operator::Elem
    - Samples
    - $s elem @strs # like any { $s eq $_ } @strs
    - $n â @nums # like any { $n == $_ } @nums
    - Yes, this is a UTF-8 named operator. No I will not apologise
  - Syntax::Operator::Equ - Equality operators that distinguish undef
  - ⊕ Notes for Syntax::Operator::Equ
    - $str equ $str # like eq but cares about undef
    - $num === $num # like == but cares about undef
  - Syntax::Operator::Elem - elem and similar operators, and the `in` meta-operator allow you to easily ask the question "does this string appear in that set of strings?" or similar for numbers. Useful combined with match/case
  - ⊕ Notes for Syntax::Operator::Elem
    - Samples
    - $x elem @strings # is a stringy comparison
    - $x â @numbers # is a numbery comparison
    - https://metacpan.org/pod/Syntax::Operator::In
    - $x in:isa @classes
  - Syntax::Operator::Is - Match operator using Data::Checks constraints
  - Syntax::Operator::Zip - Infix operator to compose two lists together
  - ⊕ Notes for Syntax::Operator::Zip
    - @list Z @list # like List::Util::zip but faster
    - @list M @list # like List::Util::mesh but faster
  - XS::Parse::Keyword - XS functions to assist in parsing keyword syntax
  - XS::Parse::Sublike - XS functions to assist in parsing sub-like syntax
- OfficeFiles
  - ⊕ See also
    - [Topic]
    - [Topic]
  - App::OfficeUtils - Utilities related to Office suite files (.doc, .docx, .odt, .xls, .xlsx, .ods, etc)
  - AsposeCellsCloud::CellsApi - Allow developers to process and manipulate spreadsheet documents (like Microsoft Excel, OpenDocument Spreadsheet, CSV, etc.) without Microsoft Office
  - AsposeSlidesCloud::SlidesApi - No description
  - Document::OOXML - Manipulation of Open Office XML files
  - ⊕ Notes for Document::OOXML
    - Similar to MsOffice::Word::Surgeon
  - ODF::lpOD - An OpenDocument management interface
  - MsOffice::Word::Surgeon - Tamper with the guts of Microsoft docx documents, with regexes
  - ⊕ Notes for MsOffice::Word::Surgeon
    - For .doc: Text::Extract::Word
    - For .docx: https://blogs.perl.org/users/c_y_fung/2023/03/textextractword-msofficewordsurgeon---weekly-travelling-in-cpan.html
    - POD contains an important See Also
  - ODF::lpOD - An OpenDocument management interface
  - ⊕ Notes for ODF::lpOD
    - Possibly unmaintained. See comments at end of ODF::lpOD_Helper
  - ODF::lpOD_Helper - Fix and enhance ODF::lpOD
  - ODF::MailMerge - "Mail Merge" or just substitute tokens in ODF documents
  - MsOffice::Word::Template - Generate Microsoft Word documents from Word templates
- OpenGL
  - ⊕ See also
    - Graphcomp is dedicated to the capture, processing, transport and rendering of online multimedia
  - OpenGL - v0.70
  - ⊕ Notes for OpenGL
    - Contains OpenGL::Array and OpenGL::Tessellation
  - OpenGL::GLFW - Perl bindings for the GLFW library
  - OpenGL::GLUT - Perl bindings to GLUT/FreeGLUT GUI toolkit
  - OpenGL::Modern - Perl extension to Modern OpenGL API up to 4.6
  - ⊕ Notes for OpenGL::Modern
    - Perl OpenGL (POGL) and Perl OpenGL::Modern (POGL2) development share common resources. At some point OpenGL::Modern will replace the legacy OpenGL implementation. Together they are referred to as POGL
- OpenGraphProtocol
  - ⊕ See also
    - https://ogp.me/
    - https://json-ld.org/
    - https://schema.org/
    - For JSON_LD
    - For MooX::Role::SEOTags
    - The Open Graph protocol enables any web page to become a rich object in a social graph
  - Web::PageMeta - Get page open-graph / meta data
- OpenTelemetry
  - ⊕ See also
    - [Topic]
    - [Topic]
    - Active
    - Archived
    - The Mojolicious Wiki
  - OpenTelemetry - A Perl implementation of the OpenTelemetry standard
  - ⊕ Notes for OpenTelemetry
    - See also https://opentelemetry.io/
  - OpenTelemetry::Exporter::OTLP - An OpenTelemetry Protocol exporter
  - OpenTelemetry::Instrumentation - Top-level interface for OpenTelemetry instrumentations
  - OpenTelemetry::Instrumentation::namespace - OpenTelemetry instrumentation for a namespace
  - OpenTelemetry::SDK - An implementation of the OpenTelemetry SDK for Perl
  - OpenTracing::Interface - API definition for OpenTransport implementations. But see OpenTelemetry
  - OpenTracing::Implementation::DataDog - Sending traces to DataDog using Agent. But see OpenTelemetry
- OrgDocHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - http://orgmode.org/
  - App::orgadb - An opinionated Org addressbook toolset
  - App::OrgUtils - Some utilities for Org documents
  - OpenAPI::Linter - Validate and lint OpenAPI specifications
  - OpenAPI::Modern - Validate HTTP requests and responses against an OpenAPI v3.1 document
  - ⊕ Notes for OpenAPI::Modern
    - Contains JSON::Schema::Modern::Document::OpenAPI and JSON::Schema::Modern::Vocabulary::OpenAPI
  - Org::Document - Represent an Org document
  - Org::Parser - Parse Org documents
  - Org::Parser::Tiny - Parse Org documents with as little code (and no non-core deps) as possible
  - Org::To::HTML - Export Org document to HTML
  - OrgINI - OrgINI file format specification
- PacketCapture
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - File::PCAP - A pure Perl library to handle libpcap based files
  - Image::ExifTool::PCAP - Read CAP, PCAP and PCAPNG Packet Capture files
  - Metabrik::Forensic::Pcap - forensic::pcap Brik
  - ⊕ Notes for Metabrik::Forensic::Pcap
    - This is part of the vast Metabrik repo
  - Net::Inspect - Library for inspection of data on various network layers
  - Net::Pcap - Interface to the pcap(3) LBL packet capture library
  - Net::Pcap::Easy - Net::Pcap is awesome, but it's difficult to bootstrap
  - Sniffer::HTTP - Multi-connection sniffer driver
- ParallelProcessing
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Consumer::NonBlock - Send data between processes without blocking
  - Coro - The only real threads in perl
  - Coro::LWP - Make LWP non-blocking - as much as possible
  - ⊕ Notes for Coro::LWP
    - The pod discusses AnyEvent::HTTP, AnyEvent::HTTP::LWP::UserAgent, LWP::Protocol::AnyEvent::http, LWP::Protocol::Coro::http
  - Coro::Multicore - Make coro threads on multiple cores with specially supported modules
  - ⊕ Notes for Coro::Multicore
    - This module uses AnyEvent and Coro
  - Coro::Select - A (slow but coro-aware) replacement for CORE::select
  - Data::Fetch - Prime method calls for background execution using threads
  - Data::PubSub::Shared - High-performance shared-memory pub/sub for Linux
  - Data::ReqRep::Shared - High-performance shared-memory request/response IPC for Linux
  - IPC::Manager - Decentralized local IPC through various protocols
  - IPC::Manager::Client - Base class for all client protocols
  - IPC::Manager::Client::SharedMem - SysV shared memory as a message store
  - IPC::Manager::Client::UnixSocket - Use UNIX sockets for message transfers
  - IPC::Manager::DBI - Database based clients for IPC::Manager
  - IPC::ReadpipeX - Also, see Also within that module's POD
  - IPC::Run3 - Run a subprocess with input/output redirection
  - IPC::System::Options - Perl's system(), readpipe()/qx, IPC::Run's run(), start() (with more options)
  - IPC::System::Simple - Run commands simply, with detailed diagnostics
  - Linux::Epoll - O(1) multiplexing for Linux
  - MCE - Many-Core Engine for Perl providing parallel processing capabilities
  - Minion - Job queue
  - NBI::Slurm - NBI Slurm module
  - Net::Async::MCP - Async MCP (Model Context Protocol) client for IO::Async
  - Net::Waiter - Compact INET socket server
  - Parallel::DataPipe - Parallel data processing conveyor
  - Parallel::ForkManager - A simple parallel processing fork manager
  - Parallel::Iterator - Simple parallel execution
  - Parallel::Loops - Execute loops using parallel forked subprocesses
  - Parallel::Pipes - Parallel processing using pipe(2) for communication and synchronization
  - ⊕ Notes for Parallel::Pipes
    - Contains Parallel::Pipes::App
  - Parallel::Prefork - A simple prefork server framework
  - Parallel::Subs - Simple way to run subs in parallel and process their return value in Perl
  - Parallel::WorkUnit - Provide multi-paradigm forking with ability to pass back data
  - ⊕ Notes for Parallel::WorkUnit
    - There are many other Parallel::* modules on CPAN
  - POE::Loop::EV - A bridge that supports EV from POE
  - POSIX::AtFork - Hook registrations at fork(2)
  - prefork - Optimized module loading for forking or non-forking processes
  - Protocol::DBus - D-Bus in pure Perl
  - ⊕ Notes for Protocol::DBus
    - Includes Protocol::DBus::Client::Mojo, among others
    - See also https://dbus.freedesktop.org/doc/dbus-specification.html
  - Resque - Redis-backed library for creating background jobs, placing them on multiple queues, and processing them later
  - Sub::Genius - Declarative concurrency planning for sequential Perl execution
  - subs::parallel - Enables subroutines to seamlessly run in parallel
  - Thread::Bless - Make blessed objects thread-aware
  - Thread::Conveyor - Transport of any data-structure between threads
  - Thread::Conveyor::Monitored - Monitor a belt for specific content
  - Thread::CSP - Communicating sequential processes threading for Perl
  - Thread::Deadlock - Report deadlocks with stacktrace
  - Thread::Exit - Provide thread-local exit(), BEGIN {}, END {} and exited()
  - Thread::Needs - Remove unneeded modules from CLONEd memory
  - Thread::Pool - Group of threads for performing similar jobs
  - Thread::Pool::Resolve - Resolve logs asynchronously
  - Thread::Queue::Any - Thread-safe queues for any data-structure
  - Thread::Queue::Any::Monitored - Monitor a queue for any specific content
  - Thread::Rand - Repeatable random sequences between threads
  - Thread::Running - Provide non-blocking check whether threads are running
  - Thread::Serialize - Serialize data-structures between threads
  - Thread::Status - Report stack status of all running threads
  - Thread::Subs - Execute selected subs concurrently in worker threads
  - ⊕ Notes for Thread::Subs
    - The POD is very sophisticated
  - Thread::Synchronized - Synchronize subroutine calls between threads
  - Thread::Use - Use a module inside a thread only
  - threads::farm - Group of threads for performing similar jobs
- ParsingStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - http://www.kate-editor.org
    - https://lindat.mff.cuni.cz/services/udpipe/
    - https://ufal.mff.cuni.cz/udpipe
    - https://universaldependencies.org/
  - Analizo - Multi-language source code analysis toolkit
  - Attean - A Semantic Web Framework
  - DMS::Parser - Pure-Perl parser for DMS, a data syntax with strong typing, ordered maps, multi-line heredocs, and front-matter metadata
  - DMS::Parser::XS - XS (C-backed) parser for DMS, a data syntax with strong typing, ordered maps, multi-line heredocs, and front-matter metadata
  - DMS::XS::Parser - Thin Perl shim over the C DMS parser
  - Grammar::Improver - A Perl module for improving grammar using LanguageTool API
  - Lingua::Word::Parser - Parse a word into scored known and unknown parts
  - Parse::FixedLength - Parse an ascii string containing fixed length fields into component parts
  - Parse::LocalDistribution - Parses local .pm files as PAUSE does
  - Parse::PMFile - Parses .pm file as PAUSE does
  - Parse::Taxonomy - Validate hierarchical data stored in CSV format
  - Parse::Tokens - Class for parsing text with embedded tokens
  - Parse::Yapp - Perl extension for generating and using LALR parsers
  - Parser::MGC - Build simple recursive-descent parsers
  - Pegex - Acmeist PEG Parser Framework
  - Perl500503Syntax::OrDie - Validate that source code is compatible with Perl 5.005_03
  - Query::Tags - Raku-inspired query language for attributes
  - Syntax::Highlight::Engine::Kate - A port to Perl of the syntax highlight engine of the Kate text editor
  - Syntax::Kamelon - A versatile and fully programmable textual content parser that is extremely well suited for syntax highlighting and code folding
  - Ufal::UDPipe - Bindings to UDPipe library http://ufal.mff.cuni.cz/udpipe
- PdfStuff
  - ⊕ See also
    - [Topic]
    - PDF::FromHTML - Below. Contains html2pdf.pl. Does not handle CSS
    - [Topic]
    - WWW::Mechanize::Chrome::Webshot - Below. Converts HTML to PDF, with CSS. Uses Chrome
    - https://mupdf.com/
    - Includes qpdf and qpdfview (a browser for PDFs)
    - Offers a huge array of free online PDF tools
  - Adobe PDF reference - Versions of PDF are 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 and now 2.0
  - ⊕ Notes for Adobe PDF reference
    - There was never a public release using version number 1.06 (from an email from Deven T. Corzine)
  - Alien::PDFio - Alien distribution for PDFio
  - ⊕ Notes for Alien::PDFio
    - See PDFio::FFI below
  - App::DiffPDFText - Diff the text of two PDF documents
  - App::Mxpress::PDF - A utility application for generating PDFs
  - App::paperback - Copy and transform pages from a PDF into a new PDF
  - App::PDFLibrarian - Manage a library of academic papers in PDF format with embedded BibTeX metadata
  - App::pdfresize - Resize each page of PDF file to a new dimension
  - App::PDFUtils - Command-line utilities related to PDF files
  - ⊕ Notes for App::PDFUtils
    - Includes 10 utilities
  - CAM::PDF - PDF manipulation library
  - CtrlO::PDF - High level PDF creator
  - Mojo::PDF - Generate PDFs with the goodness of Mojo!
  - Mxpress::PDF - A factory package and the entry point for Mxpress::PDF::* objects
  - PDF::API2 - Create, modify, and examine PDF files
  - ⊕ Notes for PDF::API2
    - See PDF::API2::Resource::XObject::Image::Imager for important comments about PDF::API2
  - PDF::API2::Resource::XObject::Image::Imager - Import Imager images into PDF
  - PDF::Builder - Facilitates the creation and modification of PDF files
  - ⊕ Notes for PDF::Builder
    - Use PDF::Builder via JSON config: https://codeberg.org/polettix/pdfunnel
    - See also https://www.catskilltech.com/FreeSW/product/PDF-Builder/title/PDF::Builder/freeSW_full
    - Example code: https://www.catskilltech.com/Examples/PDF/Builder.html
  - PDF::Collage - Layer stuff, e.g. SVG images, over PDFs
  - PDF::Cairo - Simple API for creating PDF files using the Cairo library
  - PDF::Create - Create PDF files
  - PDF::CreateSimple - Create simple PDF files using a set of easy-to-use functions
  - PDF::Data - Manipulate PDF files and objects as data structures
  - ⊕ Notes for PDF::Data
    - Includes pdf_data for dumping stuff
    - For a huge amount of info, see email from Deven T. Corzine, Friday 13:22 2024-09-27
  - PDF::FacturX - Generate Factur-X / ZUGFeRD-compatible PDF/A-3 invoices
  - PDF::FromHTML - Convert HTML documents to PDF
  - PDF::Haru - Perl interface to Haru Free PDF Library. Haru is a free, cross platform, open-sourced software library for generating PDF
  - ⊕ Notes for PDF::Haru
    - Supports Chinese, Japanese, Korean
  - PDF::Make - PDF generation, parsing, and editing
  - PDF::Report - A wrapper written for PDF::API2
  - PDF::Reuse - Reuse and mass produce PDF documents
  - ⊕ Notes for PDF::Reuse
    - This module has an important See Also
  - PDF::Reuse::Barcode - Create barcodes for PDF documents with PDF::Reuse
  - PDF::Reuse::OverlayChart - Produce simple or mixed charts with PDF::Reuse
  - PDF::Reuse::Tutorial - How to produce PDF-files with PDF::Reuse
  - PDF::Sign - Sign PDF files with CMS/CAdES signatures and RFC3161 timestamps
  - PDF::Table - A utility class for building table layouts in a PDF::Builder (or PDF::API2) object
  - ⊕ Notes for PDF::Table
    - See also https://www.catskilltech.com/FreeSW/product/PDF-Table/title/PDF::Table/freeSW_full
    - Example code: https://www.catskilltech.com/Examples/PDF/Table.html
  - PDF::WebKit - Use WebKit to Generate PDFs from HTML (via wkhtmltopdf)
  - PDFio::Architect - Creating and manipulating PDF files
  - PDFio::FFI - Perl FFI bindings for the PDFio C library
  - ⊕ Notes for PDFio::FFI
    - It allows you to read, write, and manipulate PDF files from Perl by exposing the PDFio API
  - Poppler - Bindings to the poppler PDF rendering library
  - ⊕ Notes for Poppler
    - http://poppler.freedesktop.org
    - Could not install this under Debian bookworm even after using
    - cpanm ExtUtils::PkgConfig and
    - sudo apt-get install libpoppler-glib-dev and
    - sudo apt-get install gobject-introspection and
    - PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu and
    - PKG_CONFIG_PATH=/usr/share and
    - cpanm Glib::Object::Introspection The latter fails with
    - Package gobject-introspection-1.0 was not found in the pkg-config search path
    - Sigh
    - But see PkgConfig - Pure-Perl Core-Only replacement for pkg-config
  - qpdf - QPDF is a command-line tool and C++ library that performs content-preserving transformations on PDF files
  - ⊕ Notes for qpdf
    - Here is the Git repository for qpdf: https://github.com/qpdf/qpdf
    - Documentation for qpdf is here: https://qpdf.readthedocs.io/en/stable/
    - Debian-specific notes follow. I'm using bookworm
    - libqpdf29 is installed by default for some reason
    - qpdf and qpdfview and libqpdf-dev can be installed with apt-get
    - qpfdview is a very convenient multi-doc (tabbed) viewer
    - Sample code, given x.pdf is say in v 1.6 format s output by LibreOffice
    - qpdf --force-version=1.4 x.pdf x-1.4.pdf
  - SVGPDF - Create PDF XObject from SVG data
  - ⊕ Notes for SVGPDF
    - This module processes SVG data and produces one or more PDF XObjects to be placed in a PDF document. This module is intended to be used with PDF::Builder, PDF::API2 and compatible PDF packages
  - WWW::Mechanize::Chrome::Webshot - Cheap and cheerful html2pdf converter, take a screenshot of rendered HTML, complete with CSS and Javascript
- PdlLanguage
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://pdl.perl.org/
  - CXC::PDL::Bin1D - One Dimensional Binning Utilities
  - PDL - The Perl Data Language
  - PDL::Drawing::Prima - PDL-aware drawing functions for Prima widgets
  - PDL::Graphics::PLplot - Object-oriented interface from perl/PDL to the PLPLOT plotting library
  - PDL::Fit - Various fitting implementations for PDL
  - PDL::Fit::Levmar - Levenberg-Marquardt fit/optimization routines
  - PDL::GSL - PDL interface to the GNU Scientific Library
  - PDL::LinearAlgebra - Linear Algebra utils for PDL
  - PDL::Minuit - A PDL interface to the Minuit library
  - PDL::NiceSlice - Toward a nicer slicing syntax for PDL
  - PDL::Opt::GLPK - PDL interface to the GNU Linear Programming Kit
  - PDL::Opt::Simplex::Simple - A simplex optimizer for the rest of us (who may not know PDL)
  - ⊕ Notes for PDL::Opt::Simplex::Simple
    - https://en.wikipedia.org/wiki/Simplex_algorithm
  - PDF::Perldl2 - Simple shell (version 2) for PDL
  - PDL::Stats - A collection of statistics modules in Perl Data Language, with a quick-start guide for non-PDL people
  - PDL::Transform::Cartography - Useful cartographic projections
  - PDL::Transform::Proj4 - PDL::Transform interface to the Proj4 projection library
- Perl6
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Perl6::Form - Implements the Perl 6 'form' built-in
  - ⊕ Notes for Perl6::Form
    - Requires: Perl 5.8.0
  - Perl6::Parameters - Perl 6-style prototypes with named parameters
  - Perl6::Signature - Parse, query, and pretty-print Perl 6 signatures
  - Perl6::Slurp - Implements the Perl 6 'slurp' built-in
  - ⊕ Notes for Perl6::Slurp
    - Requires: Perl 5.8.0
- PerlDeltas
  - ⊕ See also
    - https://phoenixtrap.com/2021/05/25/perl-can-do-that-now/
  - Syntax::Construct - This module documents which features (incl regexps) first appeared in which version of Perl
  - ⊕ Notes for Syntax::Construct
    - Explicitly state which non-feature constructs are used in the code
- PerlDistros
  - ⊕ See also
    - This para does not try to list all distros, but only those which somehow stand out
  - App::perl::distrolint - Distribution-wide linting tools for Perl distributions
  - App::Staticperl - Perl, libc, 100 modules, all in one standalone 500kb file
  - PerlBench - Compare several perls' performances
  - Perl::Dist::APPerl - Actually Portable Perl
  - ⊕ Notes for Perl::Dist::APPerl
    - This distro runs on several x86_64 operating systems via the same binary
    - It builds to a single binary with perl modules packed inside of it
  - Portable - Perl on a Stick
  - Portable::Dist - Modify a Perl distribution to make it portable
- PerlDocumentation
  - ⊕ See also
    - [Topic]
    - Module::CoreList - For modules which ship with Perl
    - [Topic]
    - List of resources about Perl
    - For the XS Language Reference Manual
    - For the Introduction to the Perl API
    - For Perl Mailing Lists
    - Interactive terminal-based viewer for App::sdview
    - Recent modules
    - Japanese
    - https://man.he.net/man3/- Searchable man pages
    - For Perl secret operators and constants
    - https://perldoc.perl.org/
    - https://perldoc.perl.org/perlpodspec
  - App::ManUtils - Utilities related to man(page)
  - App::sdview - A terminal document viewer for Pod and other syntaxes
  - ⊕ Notes for App::sdview
    - Contains sdview which supports POD and Markdown
  - Config::Perl::V - Structured data retrieval of perl -V output
  - Module::CoreList - What modules shipped with versions of perl
  - perlfaq - Frequently asked questions about Perl
  - perlxs - The XS Language Reference Manual
  - perlxstut - Tutorial for writing XSUBs
  - PLS - Implements features of the Language Server Protocol for Perl 5
  - ⊕ Notes for PLS
    - See also https://github.com/FractalBoy/perl-language-server
  - podweaver - Run Pod::Weaver on a file or distribution
  - Prima - a Perl graphic toolkit
  - ⊕ Notes for Prima
    - Contains podview
- PerlInternals
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For Perl Mailing Lists
    - https://metacpan.org/pod/CPAN::Porters
    - For use feature 'class'
    - https://www.nntp.perl.org/group/perl.perl5.porters/2023/01/msg265583.html
  - B - The Perl Compiler Backend
  - ⊕ Notes for B
    - Used by ogd, below
  - B::CC - Perl compiler's optimized C translation backend
  - B::Concise - Walk Perl syntax tree, printing concise info about ops
  - B::Deparse - Perl compiler backend to produce perl code
  - B::Hooks::AtRuntime - Lower blocks from compile time to runtime
  - B::Hooks::AtRuntime::OnlyCoreDependencies - It is just B::Hooks::AtRuntime but with only core dependencies
  - B::Hooks::EndOfScope - Execute code after a scope finished compilation
  - B::Hooks::EndOfScope::XS - Execute code after a scope finished compilation - XS implementation
  - B::Hooks::OP::Check - Wrap OP check callbacks
  - B::Hooks::Parser - Interface to perl's parser variables
  - B::Keywords - Lists of reserved barewords and symbol names
  - B::Lint - Perl lint - Deprecated
  - CXC::Exporter::Util - Tagged Based Exporting
  - Devel::MAT - Perl Memory Analysis Tool
  - Devel::PatchPerl - Patch perl source a la Devel::PPPort's buildperl.pl
  - Dist::Surveyor - Survey installed modules and determine the specific distribution versions they came from
  - ExtUtils::Typemaps::Magic - Typemap for storing objects in magic
  - ⊕ Notes for ExtUtils::Typemaps::Magic
    - See also Variable::Magic below
  - ExtUtils::Typemaps::Signal - A typemap bundle for dealing with signal related types
  - Filter::Simple - Simplified source filtering
  - Filter::Util::Call - Perl Source Filter Utility Module
  - ⊕ Notes for Filter::Util::Call
    - Contains 8 Filter::* modules
  - Hook::AfterRuntime - Run code at the end of the compiling scope's runtime
  - Internals - Write-protect variables, manipulate refcounts
  - ogd - Ordered global destruction
  - Opcode - Disable named opcodes when compiling perl code
  - Opcodes - More Opcodes information from opnames.h and opcode.h
  - PadWalker - Play with other peoples' lexical variables
  - Perl5::Build::Warnings - Parse make output for build-time warnings
  - Perl5::TestEachCommit - Test each commit in a pull request to Perl core
  - PPI - Parse, Analyze and Manipulate Perl (without perl)
  - Safe - Compile and execute code in restricted compartments
  - Scope::OnExit - Running code on scope exit - Deprecated
  - Sub::Exporter - A sophisticated exporter for custom-built routines
  - Sub::Exporter::Lexical - To export lexically-available subs with Sub::Exporter
  - Variable::Magic - Magic is Perl's way of enhancing variables
  - ⊕ Notes for Variable::Magic
    - This mechanism lets the user add extra data to any variable and hook syntactical operations (such as access, assignment or destruction) that can be applied to it
    - With this module, you can add your own magic to any variable without having to write a single line of XS
    - See also ExtUtils::Typemaps::Magic above
- PhoneNumbers
  - Number::Phone - Base class for Number::Phone::* modules
  - ⊕ Notes for Number::Phone
    - This module contains dozens of sub-modules
  - Phone::Valid::International::Loose - Loosely validate international phone numbers via a regex
- PhpStuff
  - PHP::Serialization - Simple flexible means of converting the output of PHP's serialize() into the equivalent Perl memory structure, and vice versa
  - PHP::Serialization::XS - Simple flexible means of converting the output of PHP's serialize() into the equivalent Perl memory structure, and vice versa - XS version
- PipeLines
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - App::PTP - An expressive Pipelining Text Processor
  - Atomic::Pipe - Send atomic messages from multiple writers across a POSIX pipe
  - File::Collector - Base class for custom File::Collector classes for classifying files and calling File::Collector::Processor methods for processing files
  - Rule::Engine - A system for creating sets of rules (RuleSets) and executing them against a list of objects
  - Sub::Chain - Chain subs together and call in succession
  - Sub::Middler - Middleware subroutine chaining
  - Sub::Pipeline - Subs composed of sequential pieces
- PlackServer
  - ⊕ See also
    - [Topic]
    - [Topic]
    - https://en.wikipedia.org/wiki/HTTP_header_injection
    - http://savage.net.au/misc/Mojo.Wiki.html
  - Gazelle - A Preforked Plack Handler for performance freaks
  - Plack - Perl Superglue for Web frameworks and Web Servers (PSGI toolkit)
  - Plack::App::Directory - Serve static files from document root with directory index
  - Plack::App::DirectoryIndex - Serve static files from document root with an index file
  - Plack::App::File - Serve static files from root directory
  - Plack::App::Register - Plack register application
  - Plack::App::Tags::HTML - Plack application for running Tags::HTML objects
  - Plack::Auth::SSO::OIDC - Implementation of OpenID Connect for Plack::Auth::SSO
  - Plack::Builder - OO and DSL to enable Plack Middlewares
  - Plack::Component - Base class for PSGI endpoints
  - Plack::Handler::H2 - High-performance HTTP/2 server handler for Plack
  - Plack::Handler::Twiggy - Adapter for Twiggy
  - Plack::Middleware - Base class for easy-to-use PSGI middleware
  - Plack::Middleware::BlockHeaderInjection - Block header injections in responses
  - Plack::Middleware::Debug - Display information about the current request/response
  - Plack::Middleware::DebugLogging - Catalyst style console debugging for plack apps
  - Plack::Middleware::DirIndex - Middleware to use with Plack::App::Directory and the like
  - Plack::Middleware::DirIndex::Htaccess - Serve default html files for directory URLS. Includes checking of .htaccess file for DirectoryIndex
  - Plack::Middleware::DirListing - Display a listing of a directory in html
  - Plack::Middleware::Expires - mod_expires for plack (see Apache webserver)
  - Plack::Middleware::Headers - Modify HTTP response headers
  - Plack::Middleware::HTTPExceptions - Catch HTTP exceptions
  - Plack::Middleware::OpenTelemetry - Plack middleware to setup OpenTelemetry spans
  - Plack::Middleware::ProofOfWork - Proof-of-Work based bot protection for Plack applications
  - Plack::Middleware::ReverseProxy - Supports app to run as a reverse proxy backend
  - Plack::Middleware::Security::Simple - A simple security filter for Plack
  - Plack::Middleware::Session - Middleware for session management
  - ⊕ Notes for Plack::Middleware::Session
    - Contains Plack::Session
  - Plack::Middleware::Session::Cookie - Session middleware that saves session data in the cookie
  - Plack::Middleware::Session::SerializedCookie - Session middleware that saves session data in the customizable serialized
  - Plack::Middleware::Session::Simple - Make Session Simple
  - Plack::Middleware::Static - Serve static files with Plack
  - Plack::Middleware::Static::OpenFileCache - Plack::Middleware::Static with open file cache
  - Plack::Middleware::Statsd - Send statistics to statsd
  - Plack::Middleware::Text::Minify - Remove HTML indentation on the fly
  - Plack::Middleware::Zitadel - Verify Bearer tokens via ZITADEL OIDC in Plack apps
  - Plack::Request - Portable HTTP request object from PSGI env hash
  - Plack::Response - Portable HTTP Response object for PSGI response
  - PlackX::Framework - A thin framework for PSGI/Plack web apps
  - WebServer::DirIndex - Directory index data for web server listings
- PodHandling
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://asciidoc.org/
    - For Perl Mailing Lists
    - https://metacpan.org/pod/perlpod
  - Aion::Annotation - Processes annotations in perl modules
  - App::Perl::Module::Examples - Tool for creating examples from Perl module POD documentation
  - App::pod - Quickly show available class methods and documentation
  - App::pod2gfm - Convert POD to GitHub Flavored Markdown
  - App::podtohtml - Convert POD to HTML
  - ⊕ Notes for App::podtohtml
    - Provides podtohtml
  - App::sdview - A terminal-based structured document viewer for POD and other formats
  - Pod::Abstract - Abstract document tree for Perl POD documents
  - Pod::AsciiDoctor - Convert from POD to AsciiDoc
  - Pod::CopyrightYears - Object for copyright years changing in POD
  - Pod::Coverage - Checks if the documentation of a module is comprehensive
  - Pod::Coverage::TrustMe - Pod::Coverage but more powerful
  - Pod::Coverage::TrustPod - Allow a module's pod to contain Pod::Coverage hints
  - Pod::Example - Module for getting example from POD
  - Pod::Extract - Remove pod from file
  - POD::Generate - Programmatically generate plain old documentation
  - Pod::Github - Convert POD to Github markdown
  - Pod::Html - Module to convert pod files to HTML
  - ⊕ Notes for Pod::Html
    - See also Pod::L10N below
  - Pod::L10N - Pod with L10N
  - Pod::LOL - Parse Pod into a list of lists (LOL)
  - Pod::Man - Convert POD data to formatted *roff input
  - Pod::Markdown - Convert POD to Markdown
  - ⊕ Notes for Pod::Markdown
    - Uses Pod::Simple
  - Pod::Markdown::Github - Convert POD to Github's specific markdown
  - Pod::Markdown::Githubert - Convert POD to Github-flavored Markdown
  - Pod::Parser - Base class for creating POD filters and translators
  - ⊕ Notes for Pod::Parser
    - But see Pod::Simple
  - Pod::Perldoc::ToToc - Translate Pod to a Table of Contents
  - Pod::POM::View::Restructured - View for Pod::POM that outputs reStructuredText
  - Pod::Query - Query pod documents
  - Pod::Markdown::Githubert - Convert POD to Github-flavored Markdown
  - Pod::Readme::Brief - A short simple README with just the essentials
  - Pod::Simple - Framework for parsing Pod
  - ⊕ Notes for Pod::Simple
    - Recommended by Pod::Parser as being preferred to the latter
  - Pod::Simple::HTML - Convert Pod to HTML
  - Pod::Simple::Wiki - A class for creating Pod to Wiki filters
  - Pod::Spell - A formatter for spellchecking Pod
  - Pod::Spell::CommonMistakes - Catches common typos in POD
  - Pod::Spelling - Send POD to a spelling checker
  - ⊕ Notes for Pod::Spelling
    - See also Test::Pod::Spelling
  - Pod::Text - Convert POD data to formatted text
  - Pod::Text::Color::Delight - Delight Light Highlight the POD
  - ⊕ Notes for Pod::Text::Color::Delight
    - Uses Pod::Text::Color
  - Pod::Text::Overstrike - Convert POD data to formatted overstrike text
  - Pod::Usage - Extracts POD documentation and shows usage information
  - Pod::Weaver - Weave together a Pod document from an outline
  - Pod::Weaver::Section::SourceGitHub - Add SOURCE pod section for a github repository
  - Pod::Webserver - Minimal web server for local Perl documentation
  - ⊕ Notes for Pod::Webserver
    - Contains podwebserver which listens on port 8020
  - Pod::Wordlist - English words that come up in Perl documentation
  - Text::AsciidocDown - Lightweight AsciiDoc to Markdown conversion
- PoeStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - File::Syslogger - Use POE to tail a file and read new lines into syslog.
  - POE - Portable multitasking and networking framework for any event loop
  - POE::Component::EasyDBI - Perl extension for asynchronous non-blocking DBI calls in POE
  - POE::Component::ElasticSearch::Indexer - POE session to index data to ElasticSearch
  - POE::Component::Server::JSONUnix - Pluggable JSON-over-Unix-socket server for POE
  - POE::Future - Use Future with POE
  - POE::Pipe::TwoWay - Replaced with delegates to IO::Pipely - Deprecated
  - POE::Stage - A base class for message-driven objects
  - Sprocket - A pluggable POE based Client / Server Library
- POSIX
  - ⊕ See also
    - [Topic]
  - POSIX - Perl interface to IEEE Std 1003.1
  - POSIX::RT::SharedMem - Create/open or unlink POSIX shared memory objects in Perl
  - POSIX::Run::Capture - Run command and capture its output
  - POSIX::2008 - Perl interface to POSIX.1-2008
  - Sys::Mmap - Uses mmap to map in a file as a Perl variable
- ProfilingCode
  - ⊕ See also
    - [Topic]
  - Devel::StatProfiler - Low-overhead sampling code profiler
  - Tiny::Prof - Perl profiling made simple to use
- ProjectManagement
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - OODoc is an Object Oriented Documentation system which will simplify the creation of usable manuals
    - https://www.atlassian.com/software/jira
  - Acrux - Southern crucis constellation for your applications
  - ⊕ Notes for Acrux
    - Obsoletes CTK::App
  - App::DesktopWorkspaceUtils - Utilities related to DesktopWorkspace
  - App::Dest - Deployment State Manager
  - App::KDEActivityUtils - Utilities related to KDE Activities
  - App::Ordo - A modern job scheduler designed for complex, hierarchical workloads
  - App::TimeTracker - Time tracking for impatient and lazy command line lovers
  - App::TimeTracker::Command::Jira - App::TimeTracker Jira plugin
  - Clearquest - Object oriented interface to Clearquest
  - ⊕ Notes for Clearquest
    - IBM Rational ClearQuest (often just called ClearQuest) is an enterprise-grade software tool used for defect tracking, change management, and workflow automation
  - CTK::App - Application interface
  - ⊕ Notes for CTK::App
    - But see Acrux
  - Desktop::KDEActivity::Util - Utilities related to KDE Activities
  - Desktop::Notify - This module provides a Perl interface to the Desktop Notifications framework
  - ⊕ Notes for Desktop::Notify
    - The framework allows applications to display pop-up notifications on an X desktop
    - More information is available from http://trac.galago-project.org/wiki/DesktopNotifications
  - DesktopWorkspace - DesktopWorkspace specification
  - Desktop::Workspace::Util - Utilities related to DesktopWorkspace
  - DesktopWorkspaceRoles::Standard - Standard set of roles for DesktopWorkspace
  - JIRA::REST - Thin wrapper around Jira's REST API
  - OODoc - Object oriented production of software documentation
  - OODoc::Template - Simple template system
- PrologLanguage
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Language::Prolog::Sugar - Syntactic sugar for Prolog term constructors
  - Language::Prolog::Types - Prolog types in Perl
- ProperNames
  - Biblio::Citation::Compare - Perl extension for performing fuzzy comparisons between bibliographic citations
  - PersonName::Format - CLDR person-name formatter for Perl
  - Text::GenderFromName - Guess the gender of an American first name
  - Text::Names - Perl extension for (USA) proper name parsing, normalization, recognition, and classification
  - Text::Names::Abbreviate - Create abbreviated name formats from full names
  - Text::Names::Canonicalize - Locale-aware personal name canonicalization with YAML rules, inheritance, and user overrides
  - Text::Names::GB - Perl extension for proper name parsing, normalization, recognition, and classification
- QrCodes
  - ⊕ See also
    - [Topic]
  - App::QRCodeUtils - Utilities related to QR Code
  - QRCode::Any - Common interface to QRCode functions
  - Image::DecodeQR::WeChat - Decode QR code(s) from images using the OpenCV/WeChat library via XS
  - QRCode::Encoder - Create QR Codes in pure Perl
  - Text::QRCode - Generate text base QR Code
- RabbitMQ
  - ⊕ See also
    - [Topic]
    - https://www.rabbitmq.com/
  - Net::RabbitMQ - Interact with RabbitMQ over AMQP using librabbitmq
  - Net::RabbitMQ::Management::API - Interface to the HTTP Rest API of the RabbitMQ management plugin
  - Net::STOMP::Client - STOMP object oriented client module
  - Net::STOMP::Client::Wrapper - Stomp Client and RabbitMQ Management API wrapper
- RakuLanguage
  - ⊕ See also
    - [Topic]
  - App::Rakubrew - Raku environment manager
- RaspberryPi
  - HiPi - Modules for Raspberry Pi GPIO
  - RPi::ADC::ADS - Interface to ADS 1xxx series analog to digital converters (ADC) on Raspberry Pi
  - RPi::ADC::MCP3008 - Interface to the MCP3008 analog to digital converter (ADC) on Raspberry Pi
  - RPi::BMP180 - Interface to the BMP180 barometric pressure sensor
  - RPi::Const - Constant variables for embedded programming, including the RPi:: family of modules
  - RPi::DAC::MCP4922 - Interface to the MCP49x2 series digital to analog converters (DAC) over the SPI bus
  - RPi::DHT11 - Fetch the temperature/humidity from the DHT11 hygrometer sensor on Raspberry Pi
  - RPi::DigiPot::MCP4XXXX - Interface to the MCP4xxxx series digital potentiometers on the Raspbery Pi
  - RPi::GPIOExpander::MCP23017 - Interface to the MCP23017 GPIO Expander Integrated Circuit over I2C
  - RPi::HCSR04 - Interface to the HC-SR04 ultrasonic distance measurement sensor on the Raspberry Pi
  - RPi::I2C - Interface to the I2C bus
  - RPi::LCD - Perl interface to Raspberry Pi LCD displays via the GPIO pins
  - RPi::OLED::SSD1306::128_64 - Interface to the SSD1306-esque 128x64 OLED displays
  - RPi::Pin - Access and manipulate Raspberry Pi GPIO pin
  - RPi::RTC::DS3231 - Interface to the DS3231 Real-Time Clock IC over I2C
  - RPi::Serial - Basic read/write interface to a serial port
  - RPi::SPI - Communicate with devices over the Serial Peripheral Interface (SPI) bus on Raspberry Pi
  - RPi::StepperMotor - Control a typical stepper motor with the Raspberry Pi
  - RPi::SysInfo - Retrieve hardware system information from a Raspberry Pi
  - RPi::WiringPi - Perl interface to Raspberry Pi's board, GPIO, LCDs and other various items
  - WiringPi::API - API for wiringPi, providing access to the Raspberry Pi's board, GPIO and connected peripherals
- RedBlackTrees
  - ⊕ See also
    - [Topic]
  - Tree::RB - Perl implementation of the Red/Black tree, a type of balanced binary search tree
  - Tree::RB::XS - Red/Black Tree and LRU Cache implemented in C
  - ⊕ Notes for Tree::RB::XS
    - Similar API to Tree::RB
  - Tree::RedBlack - Perl implementation of Red/Black tree, a type of balanced tree
- ReferenceStuff
  - Ref::Util - Utility functions for checking references
  - ⊕ Notes for Ref::Util
    - https://perladvent.org/2024/2024-12-03.html
  - Ref::Util::XS - XS implementation for Ref::Util
- RegexpStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions
    - PerlDoc
  - App::RegexpPatternUtils - CLI utilities related to Regexp::Pattern
  - App::rpgrep - Print lines matching a Regexp::Pattern pattern
  - Char::Replace - Perl naive XS character replacement as an alternate to substitute or transliterate
  - re::engine::Lua - Lua regular expression engine
  - re::engine::PCRE2 - PCRE2 regular expression engine with jit
  - Regexp::Assemble - Assemble multiple Regular Expressions into a single RE - Deprecated
  - Regexp::Common - Provide commonly requested regular expressions
  - ⊕ Notes for Regexp::Common
    - Aka Regex::Common
  - Regexp::Common::Markdown - Markdown Common Regular Expressions
  - Regexp::Common::net::CIDR - Provide patterns for CIDR blocks
  - Regexp::Common::URI::RFC3986 - Regexp patterns from RFC 3986
  - Regexp::Compare - Partial ordering for regular expressions
  - Regex::Object - Solves problems with global Regex variables side effects
  - Regexp::Parser - Base class for parsing regexes
  - Regexp::Parsertron - Parse a Perl regexp into a data structure of type Tree
  - Regexp::Pattern - Convention/framework for modules that contain collection of regexes
  - Regex::Range::Number - Generate number matching regexes
  - Regexp::Trie - Builds trie-ized regexp
  - Term::Highlight - Perl module to highlight regexp patterns on terminals
  - tstregex - A Hybrid Regex Diagnostic Tool (single file Library module and command tool) shows the longest Regular Expression match / highlight the rejected part
- RegistrySystemTesting
  - ICANN::gTLD - An interface to the ICANN gTLD database
  - ICANN::RST - A module for interacting with the Registry System Testing (RST) test specifications
- RemoteDesktops
  - ⊕ See also
    - ravada
  - Rex - The friendly automation framework
  - ⊕ Notes for Rex
    - https://www.rexify.org/docs/guides/start_using__r__ex.html
    - https://blog.ferki.it/
  - Rex::GPU - GPU detection and driver management for Rex
  - Rex::LibSSH - Rex connection backend using Net::LibSSH (no SFTP required)
  - Rex::Rancher - Rancher Kubernetes (RKE2/K3s) deployment automation for Rex
- RequestTracker
  - ⊕ See also
    - For Best Practical
  - Module::Install::RTx - RT extension installer
  - RT::Authen::OAuth2 - External authentication for OAuth 2 sources, like Google, X, Authentik, okta, GitHub, etc
  - RT::Client::REST - Client for RT using REST API
  - RT::Extension::ActivityReports - Additional reports to show Activity in RT
  - RT::Extension::AI - Add various AI Features to Request Tracker
  - RT::Extension::Announce - Display announcements as a banner on RT pages
  - RT::Extension::Assets::Import::CSV - RT Assets Import from CSV
  - RT::Extension::AttachmentViewer - View full size attachments from the dropzone
  - RT::Extension::AutomaticAssignment - Automatically assign tickets based on rules
  - RT::Extension::AWS::Assets - Manage AWS resources in RT assets
  - RT::Extension::BooleanCustomField - CF with checkbox to set or unset its value
  - RT::Extension::Captcha - Use Google reCAPTCHA v3 to verify users before some actions in RT
  - RT::Extension::ChangeManagement - Change Management configuration for RT
  - RT::Extension::CommandByMail - Change ticket metadata via email
  - RT::Extension::CommentOnCreate - Adds an optional Comment box to Ticket Creation
  - RT::Extension::ConditionalCustomFields - CF conditioned by the value of another CF
  - RT::Extension::CSAT - Customer Satisfaction Feedback extension for Request Tracker
  - RT::Extension::DynamicWebPath - Dynamic WebPath
  - RT::Extension::EmailReplyDelimiter - Strip text from emails after a delimiter
  - RT::Extension::ExcelFeed - Generate RT reports in MS Excel XSLX format
  - RT::Extension::ExtractCustomFieldValues - Extract CF values from email headers or body
  - RT::Extension::FormTools - Create multi-page ticket creation wizards for RT
  - RT::Extension::GroupSummary - Display a summary of a group
  - RT::Extension::HelpDesk - Default Help desk configuration for Request Tracker
  - RT::Extension::Import::CSV - Import data from a comma-separated value (CSV) file, or any other sort of delimited file, into RT
  - RT::Extension::InlineAudioVideoAttachments - Display audio/video attachments inline
  - RT::Extension::InlineHelp - Provides the ability to add inline help to RT web pages
  - RT::Extension::JSGantt - Gantt charts for your tickets
  - RT::Extension::MandatoryOnTransition - Require core fields and ticket custom fields on status transitions
  - RT::Extension::MandatorySubject - Enforce users to fill the subject when creating a ticket
  - RT::Extension::Memo - Add a memo widget to tickets
  - RT::Extension::MergeUsers - Merges two users into the same effective user
  - RT::Extension::ModifyUsersPrefs - Allow modification of other users' preferences
  - RT::Extension::PreviewInSearch - Preview tickets right from search results page
  - RT::Extension::QuickAssign - Add owner change links on ticket display page
  - RT::Extension::QuickCalls - Quickly create tickets in specific queues with default values
  - RT::Extension::RepeatTicket - Repeat tickets based on schedule
  - RT::Extension::RepliesToResolved - Intercept replies to resolved tickets
  - RT::Extension::ResetPassword - Add "forgot your password?" link to RT instance
  - RT::Extension::ShowTransactionSquelching - Show which users were squelched per transaction
  - RT::Extension::SwitchUsers - Switch current logged in user to others
  - RT::Extension::Tags - Provides simple tagging using custom fields
  - RT::Extension::TicketLocking - Enables users to place advisory locks on tickets
  - RT::Extension::ToggleTheme - Toggle elevator light and dark theme
  - RT::Extension::TOTPMFA - Multi-factor authentication with time-based one-time passcodes
  - RTIR::Extension::MISP - Integrate RTIR with MISP
  - ⊕ Notes for RTIR::Extension::MISP
    - https://requesttracker.com/rtir/
  - RTx::Calendar - Calendar view for RT ticket dates and custom fields
- RestfulInterface
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Net::API::REST - Framework for RESTful APIs
  - Restish::Client - A RESTish client...in perl!
- RotateLogFiles
  - Dir::Write::Rotate - Write files to a directory, with rotate options
  - File::Write::Rotate - Write to files that archive/rotate themselves
- RSS
  - App::FeedDeduplicator - A simple feed deduplicator
  - App::jupiter - Turn a list of feeds into a HTML page, a river of news
  - WWW::Noss - RSS/Atom feed reader and aggregator
  - XML::RSS - Creates and updates RSS files
- SampleCode
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Sample code
    - https://www.perturb.org/
  - Syntax::Keyword::Dynamically - Dynamically change the value of a variable
  - ⊕ Notes for Syntax::Keyword::Dynamically
    - Effectively
    - Except that the old value will also be restored in the case of exceptions, go to, next/last/redo or similar ways to leave the controlling block scope.
- SandBoxes
  - ⊕ See also
    - [Topic]
    - https://docs.kernel.org/userspace-api/landlock.html
  - Linux::Landlock - A higher level interface to the Linux Landlock API
- ScamDefences
  - Australian Government Services - Investor alert list
- ScreenStuff
  - App::XScreenSaver::DBus - Tie xscreensaver into dbus
  - Imager::Screenshot - Screenshot to an Imager image
  - Screensaver::Any - Common interface to screensaver/screenlocker functions
- SecurityPolicy
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For The Citizen Lab
    - https://security.metacpan.org/
    - For The International Consortium of Investigative Journalists
    - https://www.cvedetails.com/
    - Unicode Identifiers and Syntax
    - Unicode Security Mechanisms
    - Unicode Source Code Handling
  - Authen::SASL - SASL Authentication framework
  - Authen::SASL::Cyrus - XS SASL Authentication
  - Authen::SASL::Perl - Perl implementation of the SASL Authentication framework
  - Authen::SASL::XS - XS code to glue Perl SASL to Cyrus SASL
  - CAPE::Utils - A helpful library for CAPE, a MS Windows open-source malware sandbox
  - ⊕ Notes for CAPE::Utils
    - https://capev2.readthedocs.io/en/latest/introduction/what.html
  - CPANSA::DB - The CPAN Security Advisory data as a Perl data structure, mostly for CPAN::Audit
  - CSAF - Common Security Advisory Framework
  - CVE - Common Vulnerabilities and Exposures
  - CVSS - Perl extension for CVSS (Common Vulnerability Scoring System) 2.0/3.x/4.0
  - Data::OFAC - A Perl interface to the United States Office of Foreign Assets Control (OFAC) Specially Designated Nationals List (SDN)
  - Data::Validate::Sanctions - Validate a name against sanctions lists
  - Dist::AutomationPolicy - Generate and parse distribution automation policies
  - Dist::PolicyFiles - Generate CONTRIBUTING.md and SECURITY.md
  - Net::CVE - Fetch CVE (Common Vulnerabilities and Exposures) information from cve.org
  - Net::OSV - Search known vulnerabilities on the Open Source Vulnerabilities Database (OSV)
  - Software::Security::Policy - Packages that provide templated Security Policies
- SeismicAnalysis
  - ⊕ See also
    - https://ds.iris.edu/files/sac-manual/manual/file_format.html
  - Perlsac::rwsac - A module to read and write SAC files
- SeismicOS
  - ⊕ See also
    - [Topic]
  - App::SeismicUnixGui - A graphical user interface for Seismic Unix
- SemanticWeb
  - ⊕ See also
    - [Topic]
    - https://en.wikipedia.org/wiki/Named_graph
  - AtteanX::Store::DBI - Database quad-store
  - AtteanX::Store::LDF - Linked Data Fragment RDF store
  - AtteanX::Store::LMDB - LMDB-based RDF store
  - ⊕ Notes for AtteanX::Store::LMDB
    - This module operates at the Data Interchange (RDF) and Query (SPARQL) layers. It provides the physical location where the "Knowledge Graph" actually lives
    - Quadstores are typically queried using SPARQL
    - Common Quadstore Implementations are Apache Jena (TDB), Blazegraph, GraphDB, Virtuoso
  - AtteanX::Store::Memory - Simple in-memory RDF store
  - AtteanX::Store::SPARQL - Attean SPARQL store
- SetStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Bit::Vector - Efficient bit vector, set of integers and "big int" math library
  - Radamsa - Perl 5 bindings for the Radamsa mutational fuzzer
  - Set::Array - Arrays as objects with lots of handy methods
  - Set::Bag - Bag (multiset) class
  - Set::CrossProduct - Work with the cross product of two or more sets
  - Set::Infinite - Sets of intervals
  - Set::Light - (Memory efficient) unordered set of strings
  - Set::Object - A set of objects and strings
  - ⊕ Notes for Set::Object
    - Slowish. See Set::Light
  - Set::Product - Generates the cartesian product of a set of lists
  - Set::Product::XS - Speed up Set::Product
  - Set::Relation - Relation data type for Perl
  - Set::Scalar - Basic set operations
  - ⊕ Notes for Set::Scalar
    - Slowish. See Set::Light
  - Set::Select - Select common subsets from two or more sets
  - Set::CrossProduct - Work with the cross product of two or more sets
  - Set::Tiny - Simple sets of strings
- SidefLanguage
  - ⊕ See also
    - [Topic]
    - https://rosettacode.org/wiki/Sidef
  - Sidef - The Sidef programming language
- SlackWare
  - ⊕ See also
    - [Topic]
  - App::sbozyp - A package manager for Slackware's SlackBuilds.org
  - Slack::BlockKit - A toolkit for building Block Kit blocks for Slack
  - Slackware::SBoKeeper - SlackBuild package manager helper
- SocialMedia
  - ⊕ See also
    - https://docs.bsky.app/docs/api/
  - App::bsky - A Command-line Bluesky Client
  - At - The AT Protocol for Social Networking
  - Bluesky - Bluesky Client Library in Perl
  - Bluesky::Poster - Simple interface for posting to Bluesky (AT Protocol)
  - HTML::SocialMeta - Module to generate Social Media Meta Tags
  - ⊕ Notes for HTML::SocialMeta
    - It allows you to optimize sharing on platforms such as Twitter, Facebook, Google+ and Pinerest
- SortModules
  - ⊕ See also
    - djbsort homepage
  - App::subsort - Sort lines of text using Sort::Sub routine
  - ⊕ Notes for App::subsort
    - Contains App::sortsub
    - Uses Sort::Sub below
  - File::Util::Sort - Routines related to sorting files in one or more directories
  - Sort::DJB - Fast sorting using Daniel J. Bernstein's djbsort bitonic sorting networks
  - Sort::Fields - Provides a general purpose technique for efficiently sorting lists of lines that contain data separated into fields
  - Sort::Maker - A simple way to make efficient sort subs
  - Sort::Naturally - Sort lexically, but sort numeral parts numerically
  - Sort::Sub - Collection of sort subroutines
  - Sort::Versions - Sorting of revision-like numbers
  - SortExample::Letter::ByFrequency::ID - Ordered list of letters by usage frequency in Indonesian words
- SpreadsheetStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - App::diff_spreadsheets - Show differences between spreadsheets/csvs readably
  - Data::XLSX::Parser - Faster XLSX parser
  - ⊕ Notes for Data::XLSX::Parser
    - See Excel::ValueReader::XLSX
  - Excel::PowerPivot::Utils - Utilities for scripting Power Pivot models within Excel workbooks
  - Excel::ValueReader::XLSX - Extracting values from Excel workbooks in XLSX format, fast
  - Excel::ValueWriter::XLSX - Generating data-only Excel workbooks in XLSX format, fast
  - Excel::Writer::XLSX - Create a new file in the Excel 2007+ XLSX format
  - ⊕ Notes for Excel::Writer::XLSX
    - This module has a huge number of methods
  - Excel::XLSX - Read and write Excel XLSX data
  - Number::Base::SpreadsheetColumn - Convert spreadsheet column name (e.g. "A", "Z", "AA") to number (e.g. 0, 25, 26) and vice versa
  - Spreadsheet::CSV - Drop-in replacement for Text::CSV_XS with spreadsheet support
  - Spreadsheet::Edit - Slice and dice spreadsheets, optionally using tied variables
  - ⊕ Notes for Spreadsheet::Edit
    - Contains Spreadsheet::Edit::IO. Convert between spreadsheet and csv files
  - Spreadsheet::Engine::Function::PROPER - Spreadsheet funtion PROPER()
  - Spreadsheet::Examples - A collection of various examples of spreadsheet files
  - Spreadsheet::HTML - Just another HTML table generator
  - ⊕ Notes for Spreadsheet::HTML
    - Used by DBIx::HTML
    - Transform Excel, HTML, JSON, CSV, YAML, PNG, JPEG and GIF files instantly into HTML tables
  - Spreadsheet::Open - Open spreadsheet in a spreadsheet program
  - Spreadsheet::ParseExcel - Read information from an Excel file
  - Spreadsheet::ParseXLSX - Parse XLSX files
  - ⊕ Notes for Spreadsheet::ParseXLSX
    - See Excel::ValueReader::XLSX
  - Spreadsheet::Read - Read the data from a spreadsheet. Contains xlsx2csv
  - ⊕ Notes for Spreadsheet::Read
    - Spreadsheet::Read offers a uniformed wrapper to Spreadsheet::ParseExcel and Spreadheet::ReadSXC
    - For OpenOffice and/or LibreOffice this module uses Spreadsheet::ParseODS or Spreadsheet::ReadSXC
    - For Microsoft Excel this module uses Spreadsheet::ParseExcel, Spreadsheet::ParseXLSX, Excel::ValueReader::XLSX, or Spreadsheet::XLSX (strongly deprecated)
    - For CSV this module uses Text::CSV_XS or Text::CSV_PP
    - For Gnumeric this module uses Spreadsheet::ReadGnumeric
    - For SquirrelCalc there is a very simplistic built-in parser
  - Spreadsheet::Write - Writer for spreadsheet files (CSV, XLS, XLSX)
  - ⊕ Notes for Spreadsheet::Write
    - But see the next module
  - Spreadsheet::WriteExcel - Write to a cross-platform Excel binary file
  - Spreadsheet::Wright - Simple spreadsheet worker
  - ⊕ Notes for Spreadsheet::Wright
    - Writes files in CSV, Microsoft Excel, HTML and OpenDocument formats
    - Formats - 'csv', 'xls', 'xlsx', 'html', 'xhtml', 'xml', 'ods', 'json', or 'auto' (default)
- SpvmLanguage
  - ⊕ See also
    - [Topic]
    - https://github.com/yuki-kimoto/SPVM/wiki
    - https://go.dev/
  - SPVM - The SPVM Language
  - SPVM::Compress::Raw::Zlib - Low-Level Interface to zlib compression library
  - SPVM::DBI - DataBase Interface for SPVM
  - SPVM::Digest::MD5 - MD5
  - SPVM::Digest::SHA - SHA-1/224/256/384/512
  - SPVM::Errno - Error Numbers
  - SPVM::File::Glob - The BSD glob Porting
  - SPVM::File::Spec - Portably Perform Operations on File Names
  - SPVM::Getopt::Long - Parsing Command Line Options
  - SPVM::Go - Goroutines of The Go Programming Language
  - SPVM::HTTP::Tiny - HTTP Client
  - SPVM::IO - File IO, Sockets, Directory Manipulation, Select/Polling
  - SPVM::IO::Socket::SSL - Sockets for SSL Communication
  - SPVM::Math - Mathematical Calculations
  - SPVM::MIME::Base64 - Base64 Encoding/Decoding
  - ⊕ Notes for SPVM::MIME::Base64
    - Included in SPVM::MIME::QuotedPrint
  - SPVM::Mojolicious - Real-time web framework
  - SPVM::Net::SSLeay - OpenSSL Binding to SPVM
  - SPVM::R - Porting R language Features
  - SPVM::Re - More Perlish Regular Expressions
  - SPVM::Regex - Regular Expressions
  - SPVM::Resource::Eigen - Resource for C++ Eigen library
  - SPVM::Resource::Libpng - The Resource of The libpng Library
  - SPVM::Resource::RE2 - The Resource of Google/RE2
  - SPVM::Resource::SocketUtil - Resource for Socket Utilities
  - SPVM::Resource::SQLite - A resource that provides the SQLite header and source code
  - SPVM::Resource::Utf8proc - Bundle of the utf8proc library
  - SPVM::Resource::Zlib - Zlib Resources
  - SPVM::Sys - System Calls for File IO, Sockets, Time, Process, Signals, Users
  - SPVM::Thread - Native Thread
  - SPVM::Time::Local - Reverse Operations of localtime and gmtime
  - SPVM::Time::Piece - Dates and Times
  - SPVM::Unicode - Unicode Utilities
  - SPVM::Unicode::Normalize - Normalizing UTF-8
- SSH
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - Alien::libssh - Find or build libssh, the SSH library
  - App::ClusterSSH - Cluster administration tool
  - App::RemoteCommand - Simple remote command launcher via ssh
  - ⊕ Notes for App::RemoteCommand
  - App::sshca - A minimal SSH Certificate Authority
  - Libssh::Session - Support for the SSH protocol via libssh.
  - Net::FullAuto - Fully Automate any workload with *persistent* SSH/SFTP from one host
  - Net::LibSSH - Perl binding for libssh â SSH without SFTP dependency
  - Net::OpenSSH - Perl SSH client package implemented on top of OpenSSH
  - ⊕ Notes for Net::OpenSSH
    - POD contains this comparison: Net::OpenSSH Vs. Net::SSH::.* modules
  - Net::SFTP::Foreign - SSH File Transfer Protocol client
  - Net::SSH2 - Support for the SSH 2 protocol via libssh2
  - Net::SSH::Any - SSH client module
  - Net::SSH::Perl - Perl client Interface to SSH
  - Net::SSH2::SFTP - SSH 2 Secure FTP object
  - ssh_config - OpenSSH client configuration file
- StaticSiteBuilders
  - App::Aphra - A simple static sitebuilder in Perl
  - App::sitelenmute - A static image gallery creator
- StatisticsStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - Acme::Selection::RarestFirst - Rarest-First Selection Algorithm
  - App::freqtable - Print frequency table of lines/words/characters/bytes/numbers
  - App::wordstat - Return word statistics of a text
  - Statistics::CaseResampling - Efficient resampling and calculation of medians with confidence intervals
  - Math::LiveStats - Pure perl module to make mean, standard deviation, and p-values available for given window sizes in streaming data
  - Stats::LikeR - Get basic statistical functions, like in R, but with Perl using XS for performance
  - Statistics::Descriptive - Module of basic descriptive statistical functions
  - Statistics::Descriptive::PDL - A close to drop-in replacement for Statistics::Descriptive using PDL as the back-end
  - Statistics::Distributions - Perl module for calculating critical values and upper probabilities of common statistical distributions
  - Statistics::Krippendorff - Calculate Krippendorff's alpha
  - Statistics::Running - Basic descriptive statistics (mean/stdev/min/max/skew/kurtosis) and discrete Probability Distribution (via histogram) over data without the need to store data points
  - Statistics::Running::Tiny - Basic descriptive statistics (mean/stdev/min/max/skew/kurtosis) over data without the need to store data points
  - Statistics::Welford - Standard statistics using Welford's algorithm
- StradaStuff
  - ⊕ See also
    - https://strada-lang.github.io/
  - Strada - Call compiled Strada shared libraries from Perl
- StreamingMedia
  - App::MHFS - A Media HTTP File Server. Stream your own music and video library via your browser and standard media players
- StringStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://dotmonk.github.io/wildling/
  - App::CommonPrefixUtils - Utilities related to common prefix
  - App::CommonSuffixUtils - Utilities related to common suffix
  - Basic::Coercion::XS - Creates a coercion type that converts a string into an array reference
  - String::Binary::Interpolation - Make it easier to interpolate binary bytes into a string
  - String::Checker - An extensible string validation module (allowing commonly used checks on strings to be called more concisely and consistently)
  - String::CommonPrefix - Find prefix common to all strings
  - ⊕ Notes for String::CommonPrefix
    - Also contains String::CommonSuffix
  - String::CommonSuffix - Return suffix common to all strings
  - String::CRC32C - Castagnoli CRC
  - String::Elide::Lines - Elide lines from a string, with options
  - String::Elide::Parts - Elide a string with multiple parts of different priorities
  - String::Elide::Tiny - A very simple text truncating function, elide()
  - String::Expand - String utility functions for expanding variables in self-referential sets
  - String::Fuzzy - Python-style fuzzy string matching (fuzzywuzzy port)
  - String::Interpolate - Wrapper for builtin the Perl interpolation engine.
  - String::Interpolate::RE - Interpolate variables into strings using regular expressions
  - String::Interpolate::Shell - Variable interpolation, shell style
  - String::Lookup - Convert strings to ID's authoritatively and vice-versa
  - String::MatchInterpolate - Named regexp capture and interpolation from the same template
  - String::Print - printf alternative
  - String::Random::Regexp::regxstring - Generate random strings from a regular expression
  - String::Redactable - A string that automatically redacts itself
  - String::Scanf - Emulate sscanf() of the C library
  - String::Sprintf - Custom overloading of sprintf
  - String::Super - Compactor for superstrings
  - String::Tagged - String buffers with value tags on extents
  - String::Tagged::Formatting - An API specification for simple formatted strings
  - String::Tagged::HTML - Handle HTML content using String::Tagged
  - String::Trim::More - Various string trimming utilities
  - String::Truncate - A module for when strings are too long to be displayed in...
  - String::Util - String processing utility functions. About 22 of them
  - String::Util::Match - String utilities related to matching
  - Text::Elide - Perl module with simple "word" aware string truncating routine
  - Text::Fuzzy - Partial string matching using edit distances
  - ⊕ Notes for Text::Fuzzy
    - It handles both byte strings and character strings (strings containing Unicode), treating each Unicode character as a single entity
    - The POD contains a great list of string processing modules
  - Text::Levenshtein - Calculate the Levenshtein edit distance between two strings
  - ⊕ Notes for Text::Levenshtein
    - Contains a marvellous list of similar modules
  - Text::Levenshtein::Damerau - Damerau Levenshtein edit distance
  - Text::Levenshtein::Flexible - XS Levenshtein distance calculation with bounds and costs
  - Text::Levenshtein::XS - Calculate edit distance based on insertion, deletion, and substitution
  - Text::sprintfn - Drop-in replacement for sprintf(), with named parameter support
  - Text::Sprintf::Named - sprintf-like function with named conversions
  - Text::Truncate - Perl module with simple string truncating routine
  - Text::Wrap - Line wrapping to form simple paragraphs
  - Wildling - Pattern based string generator
- SwitchStatements
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - A reference to smartmatch
    - [Topic]
  - Dispatch::Class - Dispatch on the type (class) of an argument
  - Exception::Class::TryCatch - Syntactic try/catch sugar for use with Exception::Class
  - Feature::Compat::Try - Make try/catch syntax available
  - Hustle::Table - Cached general purpose dispatch and routing table
  - match::simple - Simplified clone of smartmatch operator
  - ⊕ Notes for match::simple
    - Obsolete. See Syntax::Operator::Matches below
  - Multi::Dispatch - Multiple dispatch for Perl subs and methods
  - Nice::Try - A real Try Catch Block Implementation Using Perl Filter
  - ⊕ Notes for Nice::Try
    - Very comprehensive. Works well with Want. See WantArray
  - Smart::Dispatch - First-class switch statements
  - Struct::Match - Exact Match (SCALAR|HASH|ARRAY)'s
  - Sub::MultiMethod - Yet another implementation of multimethods
  - Switch::Again - Keyword for either generating a reusable switch statement or calling the generated switch function directly
  - Switch::Back - Given/when for a post-given/when Perl
  - Switch::Declare - Compile-time, lexically-scoped switch/case
  - Switch::Right - Switch and smartmatch done right this time
  - Syntax::Feature::Try - Try/catch/finally statement for exception handling
  - Syntax::Infix::Smartmatch - Requires Module::Build::Tiny which will not install under GCC V 8.3.0
  - Syntax::Keyword::Match - A match/case syntax for perl
  - Syntax::Keyword::Try - A try/catch/finally syntax for perl
  - ⊕ Notes for Syntax::Keyword::Try
    - Cannot do some things Nice::Try can do
  - Syntax::Operator::Matches - match::simple but as a real infix operator
  - Syntax::Keyword::MultiSub - Multiple dispatch on subroutines
  - Switch::Plain - A simple switch statement for Perl
  - TryCatch - First class try catch semantics for Perl, without source filters
  - ⊕ Notes for TryCatch
    - But see Try::Tiny
  - Try::ALRM - Try/catch-style semantics for handling timeouts using CORE::alarm
  - Try::Catch - Try Catch exception handler based on Try::Tiny but faster
  - Try::Tiny - Minimal try/catch with proper preservation of $@
  - Try::Tiny::Tiny - Slim Try::Tiny down as far as reasonably possible
- SystemInfo
  - ⊕ See also
    - [Topic]
  - Nix::Proc::Meminfo - Access /proc/meminfo with core classes
  - ⊕ Notes for Nix::Proc::Meminfo
    - https://man7.org/linux/man-pages/man5/proc_meminfo.5.html
  - Sys::CpuLoad - Retrieve system load averages
  - ⊕ Notes for Sys::CpuLoad
    - Note: On Debian I can run w, which is /usr/bin/w
  - Sys::Export - Export a subset of an OS file tree, for chroot/initrd
  - Sys::Info::Base - Base class for Sys::Info
  - Sys::Info::Device::CPU - Collects and returns information about the Central Processing Unit (CPU) on the host machine
  - Sys::Info::Driver::Linux - Supplies detailed operating system information
  - Sys::Hostname - Try every conceivable way to get hostname
  - Sys::Hostname::Long - Try every conceivable way to get full hostname
  - Sys::Info - Extracts and collects information from the host system
  - Sys::Info::Device - This is an interface to the available devices such as the CPU
  - System::CPU - Cross-platform CPU information / topology with no dependencies
  - ⊕ Notes for System::CPU
    - Pure Perl
    - Has notes about old code such as System::Info below and
    - Unix::Processors, Sys::Info, various *::Sysinfo
  - System::Info - Factory for system specific information objects
  - ⊕ Notes for System::Info
    - The POD contains a good list of alternatives
- SystemMonitoring
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For a modular WebSSO (Single Sign On)
    - For open source network analysis and threat detection
  - Amazon::API - A generic base class for AWS Services
  - Amazon::CreatorsAPI - The Amazon Creators API Helper
  - Amazon::S3 - A portable client library for working with and managing Amazon S3 buckets and keys
  - Amazon::S3::Lite - A lightweight Amazon S3 client for common operations
  - Amazon::S3::Thin - A thin, lightweight, low-level Amazon S3 client
  - Amazon::Signature4::Lite - Lightweight AWS Signature Version 4 signing
  - Amazon::Sites - A class to represent Amazon sites
  - App::FargateStack - A lightweight deployment framework for Amazon ECS on Fargate
  - App::ipinfo - A command-line tool for IPinfo.io
  - ⊕ Notes for App::ipinfo
    - Interface to https://ipinfo.io/ - Accurate IP address data that keeps pace with secure, specific, and forward-looking use cases
  - App::rdapper - A simple console-based RDAP client
  - App::traveller - A webserver that serves Traveller RPG maps
  - AWS::Signature4 - Create a version4 signature for Amazon Web Services
  - HV::Monitor - A generalized module for gathering stats for a hypervisor
  - IPCamera::Reolink - Reolink API provides access to the System, Security, Network, Video input, Enc, Record, PTZ, and Alarm functions of a Reolink IP Camera or NVR via HTTP(S)/REST
  - Lemonldap::NG::Common - Common files for Lemonldap::NG infrastructure
  - Lemonldap::NG::Handler - The Apache protection module part of Lemonldap::NG Web-SSO system
  - Lemonldap::NG::Manager - Perl extension for managing Lemonldap::NG Web-SSO system
  - ⊕ Notes for Lemonldap::NG::Manager
    - Web Single Sign On and Access Management Software
  - Lemonldap::NG::Portal - The authentication portal part of Lemonldap::NG Web-SSO system
  - Lilith - Work with Suricata/Sagan EVE logs and PostgreSQL
  - Map::Metro - Public transport graphing
  - Map::Metro::Graph - An entire graph
  - Map::Metro::Plugin::Map::Berlin - Map::Metro map for Berlin
  - Map::Metro::Plugin::Map::Lyon - Map::Metro map for Lyon
  - Map::Tube - Lightweight Routing Framework
  - Map::Tube::API - Interface to Map::Tube REST API
  - Map::Tube::Beijing - Interface to the Beijing tube map
  - Map::Tube::Berlin - Interface to the Berlin S- and U-Bahn map
  - Map::Tube::Chicago - Interface to the Chicago L system map
  - Map::Tube::CLI - Command Line Interface for Map::Tube::* map
  - Map::Tube::Exception - Base exception package as Moo Role for Map::Tube::* family
  - Map::Tube::Generic - Interface to a map specified at runtime
  - Map::Tube::Glasgow - Interface to the Glasgow tube map
  - Map::Tube::GraphViz - GraphViz output for Map::Tube
  - Map::Tube::Hamburg - Interface to the Hamburg U- and S-Bahn maps including AKN
  - Map::Tube::KoelnBonn - Interface to the Koeln-Bonn (Cologne/Bonn) area U- and S-Bahn and tram maps
  - Map::Tube::London - Interface to the London Tube Map.
  - Map::Tube::Lyon - Interface to the Lyon metro, funicular and tramway map
  - Map::Tube::Muenchen - Interface to the Muenchen (Munich) U- and S-Bahn and tram maps
  - Map::Tube::Napoli - Interface to the Napoli tube and funicular map
  - Map::Tube::Oslo - Interface to the Oslo tube map
  - Map::Tube::Paris - Interface to the Paris metro, RER, Transiliens, and tram lines map
  - Map::Tube::Plugin::FuzzyFind - Map::Tube add-on for finding stations and lines by inexact name
  - Map::Tube::Plugin::Graph - Graph plugin for Map::Tube
  - Map::Tube::RheinRuhr - Interface to the German Rhein/Ruhr area U- and S-Bahn and tram maps
  - Map::Tube::Rome - Interface to the Rome tube map
  - Map::Tube::SanFrancisco - Interface to the San Francisco rapid transport, underground, trams and cable cars
  - Map::Tube::Server - Dancer2 based server for Map::Tube
  - Map::Tube::Stockholm - Interface to the Stockholm tube and tram map
  - Map::Tube::Stuttgart - Interface to the Stuttgart tube map
  - Map::Tube::Sydney - Interface to the Sydney Rail Network
  - Map::Tube::Toulouse - Interface to the Toulouse tube map
  - Monitoring::Livestatus - Perl API for check_mk livestatus to access runtime data from Nagios and Icinga
  - Monitoring::Sneck - A boopable LibreNMS JSON style SNMP extend for remotely running nagios style checks
  - Net::Amazon::S3 - Use the Amazon S3 - Simple Storage Service
  - Net::Cloudflare::DNS - DNS API for Cloudflare API v4
  - Net::Fortinet::FortiManager - Fortinet FortiManager REST API client library
  - Net::LDAP - Lightweight Directory Access Protocol
  - Net::Ping - Check a remote host for reachability
  - Net::Ping::External - Cross-platform Perl interface to "ping" utilities
  - Net::RDAP - Provides an interface to the Registration Data Access Protocol
  - ⊕ Notes for Net::RDAP
    - RDAP is replacing Whois as the preferred way of obtainining information about Internet resources (IP addresses, autonymous system numbers, and domain names)
    - See also App::rdapper
  - Net::RDAP::Server - An RDAP server framework
  - Net::Whois::IANA - A universal WHOIS data extractor
  - Net::Whois::IP - Perl extension for looking up the whois information for ip addresses
  - Net::Whois::Raw - Get Whois information of domains and IP addresses
  - OSLV::Monitor - OS level virtualization monitoring extend for LibreNMS
  - Paws - A Perl SDK for AWS (Amazon Web Services) APIs
  - ⊕ Notes for Paws
    - The POD has a huge list of services
  - Paws::S3::PutObject - Arguments for method PutObject on Paws::S3
  - PawsX::S3::Uploader - Upload to S3 from a streaming source
  - Suricata::Ping - Reads in a suricata config and sends a ping to the specified interface
  - Sys::Monitor::Lite - Lightweight system monitoring toolkit with JSON output
  - Sys::OsPackage - Install OS packages and determine if CPAN modules are packaged for the OS
  - ⊕ Notes for Sys::OsPackage
    - See also https://wiki.archlinux.org/title/Pacman/Rosetta
  - Sys::OsRelease - Read operating system details from standard /etc/os-release file
  - ⊕ Notes for Sys::OsRelease
    - Under Debian that file is /usr/lib/os-release
  - Sys::OsRelease::Lite - Read operating system details from standard /etc/os-release file
  - Sys::Syscall - Access system calls that Perl doesn't normally provide access to
  - Task::Map::Tube - Install the Map::Tube modules
  - Task::Map::Tube::Bundle - Bundles Map::Tube::* map packages
  - Task::Map::Tube::Metro - Install the Map::Tube concrete metro modules
  - Task::MapMetro::Maps - Map::Metro maps in a bundle
  - Travel::Routing::DE::DBRIS - Interface to the bahn.de itinerary service
  - Travel::Routing::DE::EFA - Unofficial interface to EFA-based itinerary services
  - Travel::Routing::DE::VRR - Unofficial interface to the efa.vrr.de German itinerary service
  - Travel::Status::DE::DBRIS - Interface to bahn.de / bahnhof.de departure monitors
  - Travel::Status::DE::HAFAS - Interface to HAFAS-based online arrival/departure monitors
  - Travel::Status::DE::IRIS - Interface to IRIS based web departure monitors
  - Travel::Status::MOTIS - An interface to the MOTIS routing service
  - Travel::Status::DE::VRR - Unofficial VRR departure monitor
- TabularData
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
  - App::KBLIUtils - Utilities related to Indonesian KBLI ("Klasifikasi Baku Lapangan Usaha Indonesia" a.k.a. the Indonesian ISIC "International Standard Industrial Classification of All Economic Activities")
  - ArrayData::Lingua::Word::ID::KBBI::ByClass::Adjective - Indonesian adjective words from KBBI (Kamus Besar Bahasa Indonesia)
  - ArrayData::Lingua::Word::ID::KBBI::ByClass::Verb - Indonesian verb words from KBBI (Kamus Besar Bahasa Indonesia)
  - ArrayData::Lingua::Word::ID::KBBI::FigureOfSpeech - Indonesian figure of speech (kiasan) entries from KBBI (Kamus Besar Bahasa Indonesia), 3e
  - ArrayData::Lingua::Word::ID::KBBI::Proverb - Indonesian proverb (peribahasa) entries from KBBI (Kamus Besar Bahasa Indonesia), 3e
  - ⊕ Notes for ArrayData::Lingua::Word::ID::KBBI::Proverb
    - Contains the same data as WordList::ID::KBBI::Proverb
  - TableData - Specification for TableData::*, modules that contains table data
  - TableDataBundle::Business::ID::KBLI - Collection of TableData:: modules related to KBLI (Kode Baku Lapangan Usaha, a.k.a. Standard Code of Business Field)
  - TableDataBundle::Lingua::Word::EN::ByClass::Adjective - Collection of TableData:: modules that contain English adjectives
  - TableDataBundle::Lingua::Word::EN::ByClass::Adverb - Collection of TableData:: modules that contain English adverbs
  - TableDataBundle::Lingua::Word::EN::ByClass::Noun - Collection of TableData:: modules that contain English nouns
  - TableDataBundle::Perl::CPAN::Release - Collection of TableData:: modules that contain CPAN releases data
  - TableDataBundle::Perl::Release - Collection of TableData:: modules that contain Perl releases data
  - TableDataBundle::Software::License - Collection of TableData:: modules related to software license
  - TableData::Lingua::Word::EN::Adjective::TalkEnglish - List of words that are used as adjectives only, from talkenglish.com
  - TableData::Lingua::Word::EN::Adverb::TalkEnglish - List of words that are used as adverbs only, from talkenglish.com
  - TableData::Lingua::Word::EN::ByClass::Adverb::TalkEnglish - List of words that are used as adverbs only, from talkenglish.com
  - TableData::Lingua::Word::EN::Noun::TalkEnglish - List of words that are used as nouns only, from talkenglish.com
  - TableData::Locale::US::State - US states
  - TableDataRole::Spec::Basic - Basic interface for all TableData::* modules
  - TableDataRoles::Standard - Standard set of roles for TableData
  - WordList::ID::KBBI::ByClass::Adverb - Indonesian adverb words from Kamus Besar Bahasa Indonesia (KBBI), 3e
  - WordList::ID::KBBI::Proverb - Indonesian proverb (peribahasa) entries from Kamus Besar Bahasa Indonesia (KBBI), 3e
  - ⊕ Notes for WordList::ID::KBBI::Proverb
    - Contains the same data as ArrayData::Lingua::Word::ID::KBBI::Proverb
  - WordListBundle::EN::ByCategory - Collection of English words of various categories
  - ⊕ Notes for WordListBundle::EN::ByCategory
    - Contains Animal, Bird, Flower, Food, Fruit, Insect, MusicalInstrument, Vegetable, WaterAnimal
  - WordListBundle::EN::ByClass::Adjective - Collection of English adjectives
  - WordListBundle::EN::ByClass::Adverb - Collection of English adverbs
  - WordListBundle::EN::ByClass::Noun - Collection of English nouns
  - WordListBundle::ID::ByCategory - Collection of Indonesian words of various categories
  - ⊕ Notes for WordListBundle::ID::ByCategory
    - Contains Animal, Bird, Flower, Food, Fruit, Insect, MusicalInstrument, Vegetable, WaterAnimal
- TemplateStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://mustache.github.io/
  - App::Aphra - Uses Moose and YAML
  - ⊕ Notes for App::Aphra
    - Uses Template::Toolkit and Markdown and Pandoc
    - https://aphra.perlhacks.com/
  - App::Dapper - A publishing tool for static websites
  - App::url - Format a URL according to a sprintf-like template
  - App::Wikidata::Template::CS::CitaceMonografie - Base class for Wikidata command line tool wd-citace-monografie
  - BarefootJS - Engine- and framework-agnostic server runtime for BarefootJS marked templates
  - BarefootJS::Backend::Xslate - Text::Xslate (Kolon) rendering backend for BarefootJS
  - Business::LetterWriter - Templates in JSON format
  - Data::JPack - Offline/Online Web Application Packer
  - ⊕ Notes for Data::JPack
    - Uses Template::Plexsite below
  - HP::Handy - A tiny Jinja2-compatible template engine for Perl 5.5.3 and later
  - ⊕ Notes for HP::Handy
    - See also HTTP::Handy
  - HTML::Blitz - High-performance, selector-based, content-aware HTML template engine
  - ⊕ Notes for HTML::Blitz
    - Contains HTML::Blitz::Builder
    - Pod has a discussion of performance
  - HTML::Blitz::Builder - Create HTML code dynamically and safely
  - HTML::Template::Associate - Associate relevant packages with HTML::Template
  - HTML::Template::Nest - Manipulate a nested html template structure via a perl hash
  - HTML::Zoom - Selector based streaming template engine
  - ⊕ Notes for HTML::Zoom
    - Can be extremely slow when processing large amounts of data
    - See HTML::Blitz above
  - Jinja2::TT2 - Transpile Jinja2 templates to Template Toolkit 2
  - Mason - Powerful, high-performance templating for the web and beyond
  - Mojo::Template - Perl-ish templates
  - Mustache::Simple - A simple Mustache Renderer
  - Pango - Layout and render international text
  - ⊕ Notes for Pango
    - https://developer.gnome.org/pygtk/stable/pango-markup-language.html
  - Plate - Fast templating engine with support for embedded Perl
  - String::Interpolate::Named - Interpolated named arguments in string
  - String::Interpolate::RE - Interpolate variables into strings using regular expressions
  - Templates in general - Template::Liquid
  - Template - Front-end module to the Template Toolkit
  - ⊕ Notes for Template
    - See also Template::Tiny, Text::Template::Tiny below
  - Template::AutoFilter - Template::Toolkit with automatic filtering
  - Template::EmbeddedPerl - A template processing engine using embedding Perl code
  - Template::Liquid - A Simple, Stateless Template System
  - Template::Mustache - Drawing Mustaches on Perl for fun and profit
  - Template::Nest - Manipulate a generic template structure via a perl hash
  - Template::Plex - (P)erl (L)exical and (EX)tendable Templating
  - Template::Plexsite - Templating for interlinked templates
  - Template::Plugin::Autoformat - Interface to Text::Autoformat module
  - Template::Plugin::CSV - Plugin for generating CSV
  - Template::Plugin::Latex - Template Toolkit plugin for Latex
  - Template::Plugin::StringTree - Access tree-like groups of strings naturally in code and Templates
  - Template::Provider - Provider module for loading/compiling templates
  - Template::Provider::Pandoc - Pre-process templates with Pandoc
  - Template::Sluz - A minimalistic Perl templating engine with Smarty-like syntax
  - Template::Tiny - Template Toolkit re-implemented in as little code as possible
  - ⊕ Notes for Template::Tiny
    - See Template above and Text::Template::Tiny below
  - Text::Caml - Mustache template engine
  - Text::Handlebars - http://handlebarsjs.com/ for Text::Xslate
  - Text::Hogan - A mustache templating engine statement-for-statement cloned from hogan.js
  - Text::Layout - Pango style markup formatting
  - ⊕ Notes for Text::Layout
    - This module will co-operate with PDF::API2, PDF::Builder, Cairo, and Pango
  - Text::MustacheTemplate - Fast and specification compliant Mustache template engine for Perl
  - ⊕ Notes for Text::MustacheTemplate
    - See also https://mustache.github.io/
  - Text::NeatTemplate - A fast, middleweight template engine
  - Template::Plugin::Number::Format - Plugin/filter interface to Number::Format
  - Text::Template - Expand template text with embedded Perl
  - Text::Template::Tiny - Variable substituting template processor
  - ⊕ Notes for Text::Template::Tiny
    - See Template and Template::Tiny above
  - Text::Textile - A humane web text generator
  - Text::Textile2MarcdownStandalone - Standalone converter from Textile markup to Markdown
  - Text::XSlate - Scalable template engine for Perl5
  - ⊕ Notes for Text::XSlate
    - Even faster than HTML::Blitz
  - YATT::Lite - Template with "use strict"
- TestingHelp
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - Test::InDomain within DataValidation
    - test.openssl.pl - Test regexps
    - [Topic]
    - [Topic]
    - For test results for any module
    - https://magpie.cpantesters.org/
    - https://perlmaven.com/devel-cover-for-markua-parser
  - App::CPANTS::Lint - Front-end to Module::CPANTS::Analyse
  - App::local::lib::helper - Make it easy to run code against a local-lib
  - App::Prove - Implements the prove command
  - ⊕ Notes for App::Prove
    - Part of Test::Harness (below)
  - App::Prove::Plugin::Metrics - Emit metrics when running prove
  - ⊕ Notes for App::Prove::Plugin::Metrics
    - Contains TAP::Harness::Metrics, TAP::Parser::Metrics
  - App::Prove::Plugin::SetEnv - A prove plugin to set environment variables
  - App::ReportPrereqs - Report prerequisite versions
  - App::Run::Command::ToFail - Base class for run-command-to-fail tool
  - App::SimpleScan - simple_scan's core code
  - ⊕ Notes for App::SimpleScan
    - Contains simple_scan and simple_report and many examples
    - simple_scan reads test specifications from standard input and generates Perl code based on these specifications
  - App::Test::Generator - Generate fuzz and corpus-driven test harnesses
  - App::Yath::Plugin::Utilization - System-utilization gating for yath test runs
  - App::Yath::Script - Script initialization and utility functions for Test2::Harness
  - Archive::Merged - Virtually merge two archives
  - ⊕ Notes for Archive::Merged
    - Meaning you can interrogate one or more archives or directories
  - Assert::Refute - Unified testing and assertion tool
  - assertions - Select assertions in blocks of code
  - Carp::Assert - Executable comments
  - Carp::Assert::More - Convenience assertions for common situations
  - Chicken::Ipsum - Generate random chicken noises
  - circular::require - Detect circularity in use/require statements
  - ⊕ Notes for circular::require
    - See also Test::CircularDependencies
  - Config::Model::Tester - Test framework for Config::Model
  - CPAN test results for a typical module - https://matrix.perl-magpie.org/dist.php?dist=Tree-DAG_Node
  - CPAN::Test::Dummy::Perl5::ModuleBuildTiny - Test distribution that depends on Module::Build::Tiny
  - CPAN::Test::Dummy::Perl5::ExtUtilsMakeMaker - Test distribution that depends on ExtUtils::MakeMaker
  - Cucumber::Messages - Library of classes to encapsulate Cucumber messages
  - Cucumber::TagExpressions - Tag expression parser
  - Cucumber::Test::Release::Automation - In lib/Cucumber/Test/Release/Automation.pm
  - Data::Compare - Compare Perl data structures
  - Data::Maker - Simple, flexible and extensible generation of realistic data - Iincludes gender
  - Data::Person - Data object for person - Includes gender
  - Data::Random - Perl module to generate random data
  - Data::RandomPerson - Create random person data - Includes gender
  - Data::Random::Person - Random person objects
  - ⊕ Notes for Data::Random::Person
    - Could use Mock::Person::US instead of Mock::Person:CZ
    - Uses Data::Person
    - Includes gender
  - Data::Random::String::Matches - Generate random strings matching a regex
  - Data::Random::Weighted - Get weighted random data
  - ⊕ Notes for Data::Random::Weighted
    - Limited to picking 1 item
  - Date::Range - Work with a range of dates
  - Date::Simple - A simple date object
  - Data::SimplePassword - Simple random password generator
  - DateTime::Event::Random - DateTime extension for creating random datetimes
  - DateTime::Event::Recurrence - DateTime::Set extension for create basic recurrence sets
  - DBD::Mock::Session::GenerateFixtures - This distribution generates fixtures for DBD-Mock-Session module
  - DBIx::Class::MockData - Generate mock test data for DBIx::Class schemas
  - Environment::Is - Detect environments like Docker or WSL
  - Fennec - A testers toolbox, and best friend - Deprecated
  - Gherkin - A parser and compiler for the Gherkin language
  - ⊕ Notes for Gherkin
    - See Test::BDD::Cucumber below
  - Getopt::Kingpin - Command line options parser (like golang kingpin)
  - HealthCheck - A health check for your code
  - HealthCheck::Parallel - A HealthCheck that uses parallelization for running checks
  - JMAP::Tester - A JMAP client made for testing JMAP servers
  - JMAP::Tester::WebSocket - A WebSocket JMAP client made for testing JMAP servers
  - Keyword::DEVELOPMENT - Have code blocks which don't exist unless you ask for them.
  - Mock::Config - Temporarily set Config or XSConfig values
  - Mock::Data - Extensible toolkit for generating mock data
  - ⊕ Notes for Mock::Data
    - Has a dozen subclasses
  - Mock::Data::Regex - Generator that uses a Regex as a template to generate strings
  - ⊕ Notes for Mock::Data::Regex
    - Similar to String::Random::Regexp::regxstring in StringStuff
  - Mock::Person - Generates random last, first and middle name of person
  - Mock::Populate - Mock data creation
  - Mockery - Mock objects for testing purposes
  - Module::CPANTS::Analyse - Generate Kwalitee ratings for a distribution
  - ⊕ Notes for Module::CPANTS::Analyse
    - See also App::CPANTS::Lint
  - Module::Mask - Pretend certain modules are not installed
  - Noise - Pure Perl implementation of the Noise Protocol Framework
  - Perl::MinimumVersion::Fast - Find a minimum required version of perl for Perl code
  - PerlX::Assert - Yet another assertion keyword
  - Plack::Test - Test PSGI applications with various backends
  - Plack::Test::Agent - OO interface for testing low-level Plack/PSGI apps
  - Random::Day - Class for random day generation
  - Random::Day::InTheFuture - Class for random day generation in the future
  - Random::Day::InThePast - Class for random day generation in the past
  - Random::Set - Class for random set generation
  - Result::Simple - A dead simple perl-ish Result like F#, Rust, Go, etc
  - ⊕ Notes for Result::Simple
    - Result represents a function's return value as success or failure, enabling safer error handling and more effective control flow management
  - Scientist - Test new code against old.
  - SimpleMock - A simple mocking framework for Perl
  - Sub::Assert - Subroutine pre- and postconditions, etc
  - Subs::Trace - Trace all calls in a package
  - Syntax::Keyword::Assert - Assert keyword for Perl
  - TAP::DOM - TAP as Document Object Model
  - TAP::Formatter::HTML - TAP Test Harness output delegate for html output
  - TAP::Harness - Prove supports TAP::Harness plugins and has a plugin system of its own
  - ⊕ Notes for TAP::Harness
    - Usage: prove -Ilib [-j 9] -r t where t is the dir name
    - See "FORMATTERS" in prove, "SOURCE HANDLERS" in prove and App::Prove for more details
  - Tapper::Cmd - Backend functions for CLI and Web
  - ⊕ Notes for Tapper::Cmd
    - Search MetaCPAN for Tapper:: to find other components of this set
  - Task::Perl::Critic - Install everything Perl::Critic
  - Testcontainers - Makes it simple to create and clean up container-based dependencies
  - Test::Against::Commit - Test CPAN modules against Perl dev releases
  - Test::Against::Dev - Test CPAN modules against Perl dev releases
  - Test::BDD::Cucumber - Feature-complete Cucumber-style testing in Perl
  - ⊕ Notes for Test::BDD::Cucumber
    - See also Gherkin above
  - Test::Builder - Back-end for building test libraries
  - Test::Changes::Strict::Simple - Strict semantic validation for CPAN Changes files
  - Test::CheckDeps - Check for presence of dependencies
  - Test::CheckGitStatus - Check git status after every test
  - Test::CircularDependencies - Make sure non of the modules depend on themselves
  - Test::Class - Easily create test classes in an xUnit/JUnit style
  - Test::Class::Moose - Serious testing for serious Perl
  - Test::CleanNamespaces - Check for uncleaned imports
  - Test::Compile - Assert that your Perl files compile OK
  - Test::CPAN::Changes - Validation of the Changes file in a CPAN distribution
  - Test::CPAN::Changes::ReallyStrict - Ensure a Changes file looks exactly like it would if it was machine generated
  - Test::CPAN::Health - Analyse a CPAN distribution and produce a comprehensive health report
  - Test::CPAN::Meta - Validate your CPAN META.yml files
  - Test::CPAN::Meta::JSON - Validate a META.json file within a CPAN distribution
  - Test::CPANfile - See if cpanfile lists every used modules
  - Test::CVE - Test against known CVE's
  - Test::Data - Provides utility functions to check properties and values of data and variables
  - ⊕ Notes for Test::Data
    - See also Mock::Data above
  - Test::Database::Temp - Create temporary test databases and run tests in all available ones
  - ⊕ Notes for Test::Database::Temp
    - Database::Temp is also in DatabaseAndSQL1
  - Test::Deep - Extremely flexible deep comparison
  - ⊕ Notes for Test::Deep
    - Has over 40 sub-modules
  - Test::Deep::Hashbag - A Test::Deep hash comparator ignoring hash keys
  - Test::Dependencies - Ensure that the dependency listing is complete
  - Test::DescribeMe - Tell test runners what kind of test you are
  - Test::Differences - Test strings and data structures and show differences if not ok
  - Test::DistManifest - Author test that validates a package MANIFEST
  - Test::Env - Test the environment
  - Test::Exception - Test exception-based code
  - ⊕ Notes for Test::Exception
    - See also Test::Fatal
  - Test::Expander - Expansion of test functionalities that appear to be frequently used while testing
  - Test::ExpectAndCheck - Expect/check-style unit testing with object methods
  - Test::Fatal - Incredibly simple helpers for testing code with exceptions
  - ⊕ Notes for Test::Fatal
    - See also Test::Exception
  - Test::File - Test file attributes
  - Test::File::Contents - Test routines for examining the contents of files
  - Test::File::Cmp - Test routine for file comparison independent of CRLF or LF line endings.
  - Test::File::ShareDir - Create a Fake ShareDir for your modules for testing
  - Test::File::ShareDir::Dist - Simplified dist oriented ShareDir tester
  - Test::Fixme - Check code for FIXMEs
  - Test::Future::IO::Impl - Acceptance tests for Future::IO implementations
  - Test::Harness - Run Perl standard test scripts with statistics
  - Test::HTML::Content - Perl extension for testing HTML output
  - Test::HTTP::LocalServer - Spawn a local HTTP server for testing
  - Test::HTTP::Scenario - Deterministic record/replay of HTTP interactions for test suites
  - Test::HTTPStatus - Check an HTTP status
  - Test::Inline - Embed your tests in your code, next to what is being tested
  - Test::Instruction - A test framework
  - Test::Inter - Framework for more readable interactive test scripts
  - Test::Is - Skip test in a declarative way, following the Lancaster Consensus
  - Test::ISBN - Check International Standard Book Numbers
  - Test::IsAny - Check if a value is any of the given values
  - Test::JSON::Schema - Test your data against a JSON Schema
  - Test::JSON::Schema::Acceptance - Acceptance testing for JSON-Schema based validators
  - Test::Kit - Build custom test packages with only the features you want
  - ⊕ Notes for Test::Kit
    - Similar modules: Import::Base, Toolset
    - Test::Kit largely differs from these in that it always makes your module behave like Test::More
  - Test::Kwalitee - Test the Kwalitee of a distribution before you release it
  - Test::Kwalitee::Extra - Run Kwalitee tests including optional indicators, especially, prereq_matches_use
  - Test::Load::Helper - Automatically load test helpers by walking the directory tree
  - Test::Manifest - Interact with a t/test_manifest file
  - Test::Memcached - Memcached Runner For Tests
  - Test::MinimumVersion - Does your code require newer perl than you think?
  - Test::MinimumVersion::Fast - Does your code require newer perl than you think?
  - Test::MixedScripts - Test text for mixed and potentially confusable Unicode scripts
  - ⊕ Notes for Test::MixedScripts
    - See also https://util.unicode.org/UnicodeJsps/confusables.jsp
  - Test::Mock::Guard - Simple mock test library using RAII
  - Test::MockFile - Allows tests to validate code that can interact with files without touching the file system
  - Test::Mockingbird - Advanced mocking library for Perl with support for dependency injection and spies
  - Test::MockModule - Override subroutines in a module for unit testing
  - Test::MockTime - Replaces actual time with simulated time
  - Test::MockTime::HiRes - Replaces actual time with simulated high resolution time
  - Test::Mojibake - Check your source for encoding misbehavior
  - Test::More - See Test::Simple or Test::Simpler
  - Test::Most::Explain - Enhanced diagnostics for Test::More with structured diffs and helpful hints
  - Test::mysqld - mysqld runner for tests
  - Test::Needs - Skip tests when modules not available
  - Test::Nginx - Data-driven test scaffold for Nginx C module and Nginx/OpenResty-based libraries and applications
  - Test::NoBreakpoints - Test that files do not contain soft breakpoints
  - Test::NoTabs - Check the presence of tabs in your project
  - Test::NoWarnings - Make sure you didn't emit any warnings while testing
  - Test::Output - Utilities to test STDOUT and STDERR messages
  - Test::Perl::Critic - Use Perl::Critic in test programs
  - Test::Perl::Critic::Progressive - Gradually enforce coding standards
  - Test::PerlTidy - Check that all your files are tidy
  - Test::Pod - Check for POD errors in files
  - Test::Pod::Coverage - Check for pod coverage in your distribution
  - Test::Pod::LinkCheck - Tests POD for invalid links
  - Test::Pod::LinkCheck::Lite - Test POD links
  - Test::Pod::Links - Test Pod for invalid HTTP/S links
  - Test::Pod::No404s - Using this test module will check your POD for any http 404 links
  - Test::Pod::Spelling - A Test library to spell-check POD filesTest::Pod::Spelling - A Test library to spell-check POD files
  - ⊕ Notes for Test::Pod::Spelling
    - See also Pod::Spelling, Test::Spelling
  - Test::Pod::Spelling::CommonMistakes - Checks POD for common spelling mistakes
  - Test::Portability::Files - Check file names portability
  - Test::PostgreSQL - PostgreSQL runner for tests
  - Test::PostgreSQL::v2 - A modern, isolated PostgreSQL executable runner for tests
  - Test::Prereq - Check if Makefile.PL has the right prerequisites
  - ⊕ Notes for Test::Prereq
    - Supersedes the next module
  - Test::Prereq::Meta - Test distribution prerequisites against CPAN meta data file
  - ⊕ Notes for Test::Prereq::Meta
    - But see Test::Prereq
  - Test::QuickGen - Utilities for generating random test data
  - Test::RedisServer - Redis-server runner for tests
  - Test::Regexp - Test your regular expressions
  - Test::Regexp::Pattern - Test Regexp::Pattern patterns
  - Test::Reporter - Sends test results to cpan-testers@perl.org
  - Test::Reporter::Transport - Base class for Test::Reporter transports
  - Test::Reporter::Transport::Metabase - Metabase transport for Test::Reporter
  - Test::Requires - Checks to see if the module can be loaded
  - Test::Returns - Verify that a method's output agrees with its specification
  - Test::Routine - Composable units of assertion
  - Test::Script - Basic cross-platform tests for scripts
  - Test::Settings - Ask or tell when certain types of tests should be run
  - Test::SFTP - An object to help test SFTPs
  - Test::Signature - Automated SIGNATURE testing
  - ⊕ Notes for Test::Signature
    - See also Module::Signature in ModuleBuilding
  - Test::Simple - Basic utilities for writing tests
  - ⊕ Notes for Test::Simple
    - Has a huge array of components
    - Contains Test::More and Test2
    - But see the next module
  - Test::Simpler - Simpler than Test::Simple; more powerful than Test::More
  - Test::Smoke - The Perl core test smoke suite
  - Test::SPDX::Coverage - Perl Test Harness to verify all matched files in Manifest have a SPDX-License-Identifier
  - Test::Spelling - Check for spelling errors in POD files
  - ⊕ Notes for Test::Spelling
    - See also Test::Pod::Spelling
  - Test::Spelling::Stopwords - POD spell-checking with project-specific stopwords
  - Test::SQLite - SQLite setup/teardown for tests
  - Test::Strict - Check syntax, presence of use strict; and test coverage
  - Test::Subunit::V2 - Subunit version 2 binary protocol support
  - ⊕ Notes for Test::Subunit::V2
    - Contains Test::Subunit, Test::Subunit::Diff
  - Test::TCP - Testing TCP program
  - Test::TempDir::Tiny - Temporary directories that stick around when tests fail
  - ⊕ Notes for Test::TempDir::Tiny
    - Strongly recommended over File::Temp which uses global "our" variables, which affects Capture::Tiny, since the latter also uses File::Temp. Don't do that
  - Test::TrailingSpace - Test for trailing space in source files
  - Test::Trap - Trap exit codes, exceptions, output, etc
  - Test::Unit - The PerlUnit testing framework
  - Test::URI - Check Uniform Resource Identifiers
  - Test::utf8 - Handy utf8 tests
  - Test::ValkeyServer - Valkey-server runner for tests
  - Test::Version - Check to see that version's in modules are sane
  - Test::Warn - Perl extension to test methods for warnings
  - Test::Warnings - Test for warnings and the lack of them
  - Test::Which - Skip tests if external programs are missing from PATH (with version checks)
  - Test::Without::Module - Test fallback behaviour in absence of modules
  - ⊕ Notes for Test::Without::Module
    - See also Devel::Hide
  - Test::WWW::Mechanize - Testing-specific WWW::Mechanize subclass
  - ⊕ Notes for Test::WWW::Mechanize
    - There are many similar modules on MetaCPAN
    - https://metacpan.org/search?size=20&q=Test::WWW::Mechanize
  - Test::WWW::Simple - Test Web applications using TAP
  - Test::XML - Compare XML in perl tests
  - Test::XML::Easy - Test XML with XML::Easy
  - XML::SemanticDiff - Perl extension for comparing XML documents.
  - Test::XML::Simple - Easy testing for XML
  - Test::YAFT - Yet another testing framework
  - T2 - Define the T2 namespace that can always be used to access functionality from a Test2 bundle such as Test2::V1
  - Test2::API - Primary interface for writing Test2 based testing tools
  - Test2::Bundle::Numerical - Numerical Quadmath/longdouble aware Test2 bundle
  - Test2::Harness - Contains yath, which replaces test and prove (see below for usage of prove)
  - ⊕ Notes for Test2::Harness
    - https://perladvent.org/2023/2023-12-23.html
  - Test2::Harness2::ChildSubReaper - Tiny XS wrapper around Linux's PR_SET_CHILD_SUBREAPER prctl.
  - Test2::Plugin::MemUsage - Collect and display memory usage information
  - Test2::Plugin::SubtestFilter - Filter subtests by name
  - Test2::Plugin::UUID - Use REAL UUIDs in Test2
  - Test2::Require::ProgramInPath - Skip test unless a program exists in the PATH
  - Test2::Suite - Distribution with a rich set of tools built upon the Test2 framework
  - Test2::Tools - Documentation for Tools
  - ⊕ Notes for Test2::Tools
  - Test2::Tools::ComboObject - Combine checks and diagnostics into a single test as an object
  - Test2::Tools::DOM - Tools to test HTML/XML-based DOM representations
  - Test2::Tools::LoadModule - Test whether a module can be successfully loaded
  - Test2::Tools::PerlTidy - Test2 check that all of your Perl files are tidy
  - Test2::Tools::Pod - Check that POD syntax is valid
  - Test2::Tools::Spec - RSPEC implementation on top of Test2::Workflow
  - Test2::Tools::Subtest - Tools for writing subtests
  - Test2::Tools::TypeTiny - Test2 tools for checking Type::Tiny types
  - Test2::Tools::URL - Compare a URL in your Test2 test
  - Test2::Transition - Transition notes when upgrading to Test2
  - ⊕ Notes for Test2::Transition
    - See also: https://metacpan.org/pod/Test2::Suite
  - Test2::Util::DistFiles - Gather files in a distribution
  - Test2::Util::Guard - Inline copy of Scope::Guard
  - Test2::V1 - V1 edition of the Test2 recommended bundle
  - Test2::Workflow - A test workflow is a way of structuring tests using composable units
  - Time::RTM - Run-time metrics stats
  - UNIVERSAL::dump - Add dump and other methods to all classes and objects
- TextProcessing
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://fontawesome.com/- For a huge list of icons
    - For the homepage of fzf. See also fd
    - OpenRefine is a powerful free, open source tool for working with messy data
    - A universal document converter
    - For fd aka fd-find. See also fzf
    - Not Perl but can use reStructuredText
  - Aion::Format - Perl extension for formatting numbers, coloring output, etc
  - Algorithm::Diff - Compute differences between two files / lists
  - Algorithm::Diff::XS - Algorithm::Diff with XS core loop
  - Algorithm::LCS::XS - Fast (XS) implementation of the Longest Common Subsequence (LCS) Algorithm
  - Algorithm::MLCS - Fast heuristic algorithm for finding Longest Common Subsequence of multiple sequences
  - Antsy - Streaming ANSI escape sequences
  - App::AlgorithmDiffUtils - CLI utilities based on Algorithm::Diff
  - App::FzfUtils - fzf is an interactive filter program for any kind of list
  - App::optex::textconv - Optex module to replace document file by its text contents
  - App::PPI::Dumper - Use the PPI to dump the structure of a Perl file
  - App::s2p - A stream editor
  - App::TextTemplatePermuteUtils - CLI utilities related to Text::Template::Permute
  - Ascii::Text - Module for generating ASCII text in various fonts and styles
  - Bible::OBML - Open Bible Markup Language parser and renderer
  - Bible::OBML::Gateway - Bible Gateway content conversion to Open Bible Markup Language
  - Bible::Reference - Simple Bible reference parser, tester, and canonicalizer
  - Data::Text - Class to handle text in an OO way
  - Data::Text::Simple - Data object for text in language
  - File::MultipleDiff - Compare multiple files
  - Hash::Diff - Return difference between two hashes as a hash
  - HTML::Differences - Reasonable sane HTML diffing
  - HTML::Quoted - Extract structure of quoted HTML mail message
  - ⊕ Notes for HTML::Quoted
    - Various MUAs use quite different approaches for quoting in emails
    - Purpose and returned structures are very similar to those in Text::Quoted
    - Uses HTML::Parser
  - Indent - Class for indent handling
  - ⊕ Notes for Indent
    - See also Tags::Output::Indent
  - Indent::Block - Class for block indenting
  - Indent::Data - Class for data indenting
  - Indent::String - Class for text indenting
  - Indent::Word - Class for word indenting
  - Intellexer - API client for Intellexer
  - ⊕ Notes for Intellexer
    - Perl API client for the Intellexer, a webservice that, "enables developers to embed Intellexer semantics products using XML or JSON."
  - LCS - Longest Common Subsequence
  - ⊕ Notes for LCS
    - Contains LCS::Tiny
  - LCS::Similar - Allow differences in the compared elements of Longest Common Subsequence (LCS) Algorithm
  - LCS::XS - Fast (XS) implementation of the Longest Common Subsequence (LCS) Algorithm
  - Lingua::TermWeight - Language-independent TermWeight calculator
  - Lingua::Thesaurus - Thesaurus management
  - Pandoc - Wrapper for the mighty Pandoc document converter
  - Parse::RecDescent - Generate Recursive-Descent Parsers
  - Perl::MinimumVersion - Find a minimum required version of perl for Perl code
  - PPI - Parse, Analyze and Manipulate Perl (without perl)
  - PPI::Statement::Variable - Variable declaration statements
  - PPIx::Regexp - Represent a regular expression of some sort
  - PPIx::Utilities - Extensions to PPI.
  - PPIx::Utils - Utility functions for PPI
  - PPR - Pattern-based Perl Recognizer
  - ⊕ Notes for PPR
    - The docs compare it with PPI
  - Quote::Code - Quoted strings with arbitrary code interpolation
  - Regexp::Grammars - Add grammatical parsing features to Perl 5.10 regexes
  - String::Diff - Simple diff to String
  - ⊕ Notes for String::Diff
    - Various ways of listing the difference between 2 strings
  - String::Escape - Backslash escapes, quoted phrase, word elision, etc
  - String::Glob::Permute - Expand {foo,bar,baz}[2-4] style string globs
  - Tags - Structure oriented SGML/XML/HTML/etc. elements manipulation
  - Tags::Output::Indent - Indent class for Tags
  - ⊕ Notes for Tags::Output::Indent
    - See also Indent
  - Tags::Output::LibXML - Printing 'Tags' structure by LibXML library
  - Term::ANSIScreen - Terminal control using ANSI escape sequences
  - Text::Amuse - Generate HTML and LaTeX documents from Emacs Muse markup
  - Text::Amuse::Compile - Compiler for Text::Amuse
  - Text::ANSI::Fold - Text folding library supporting ANSI terminal sequence and Asian wide characters with prohibition character handling
  - Text::ANSI::Printf - Printf function to print string including ANSI sequence
  - Text::ANSI::Util - Routines for text containing ANSI color codes
  - Text::Autoformat - Automatic text wrapping and reformatting
  - Text::Balanced - Extract delimited text sequences from strings
  - Text::Conceal - Conceal and recover interface for text processing
  - Text::Diff - Perform diffs on files and record sets
  - Text::Diff::FormattedHTML - Generate a colorful HTML diff of strings/files
  - Text::Diff::HTML - XHTML format for Text::Diff::Unified
  - Text::Diff::Parser - Parse patch files containing unified and standard diffs
  - Text::Diff::Unified::XS - The fast Text::Diff module
  - Text::DiffU - Diff two sequences and print unified-style output
  - Text::Diff3 - Three way text comparison and merging
  - Text::Diff3::Text - Line number scheme free text buffer
  - Text::FindIndent - Heuristically determine the indent style
  - Text::Fragment - Manipulate fragments in text
  - Text::Glob - Match globbing patterns against text
  - Text::Lorem - Generate random Latin looking text
  - Text::Glob::Expand - Permute and expand glob-like text patterns
  - Text::Minify::XS - Remove indentation and trailing whitespace from multi-line text
  - Text::OutputFilter - Enable post processing of output without fork
  - Text::ParseWords - Parse text into an array of tokens or array of arrays
  - Text::PrettyTable - Allow for auto-fixed-width formatting of raw data
  - Text::Quoted - Extract the structure of a quoted mail message
  - ⊕ Notes for Text::Quoted
    - Uses Text::Autoformat
    - Uses Text::Tabs
  - Text::Stencil - Fast XS list/table renderer with escaping, formatting, and transform chaining
  - Text::Tabs - Expand and unexpand tabs like unix expand(1) and unexpand(1)
  - Text::Template::Permute - Template for generating permutation of text
  - Text::Unpack::Auto - Automatically generate unpack strings from fixed-width text
  - Text::vFile::asData - Parse vFile formatted files into data structures
  - ⊕ Notes for Text::vFile::asData
    - Reads vFile format files, such as vCard (RFC 2426) and vCalendar (RFC 2445)
    - An app using it! See https://metacpan.org/pod/App::MergeCal
    - Command line program that merges iCal files into a single calendar
    - See TheRFCGuide for rfc2426, rfc2445
  - Text::VisualPrintf - Printf family functions to handle Non-ASCII characters
  - Tree::Lexicon - Object class for storing and retrieving a lexicon in a tree of affixes
  - Treex::PML - Perl implementation for the Prague Markup Language (PML).
  - Treex::Unilang - Collection of blocks parametrized by language and language independent
  - ⊕ Notes for Treex::Unilang
    - Includes Czech
  - Web::Microformats2 - Read Microformats2 metadata from HTML or JSON
  - XML::Diff - XML DOM-Tree based Diff & Patch Module
  - YAML::Diff - Diff 2 YAML Documents Semantically
- TheCharacterGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Clone::AsUTF8Bytes - Recursively copy Perl data converting to UTF-8 bytes
- TheEUNormGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
  - European Norm EN 16931 - Electronic invoicing
  - Regulation (EU) 2016/679 - The protection of natural persons with regard to the processing of personal data and on the free movement of such data
- TheISOGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
  - ISO 639 - Codes for the representation of languages and language groups
  - ISO 639-2 - Codes for the representation of names of languages â Part 2: Alpha-3 code
  - ISO 8601-1:2019 - Date and time â Representations for information interchange
  - ISO 2788 - Replaced by ISO 25964-1
  - ISO 15924 - Codes for the representation of names of scripts
  - ISO 25964 - Replaced by ISO/FDIS 25964
  - ISO/FDIS 25964 - Information and documentation â Thesauri and interoperability with other vocabularies
- TheLanguageGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
- TheOSGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For the Debian.Wiki
- ThePolicyGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
- TheRFCGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
  - rfc959 - FILE TRANSFER PROTOCOL (FTP)
  - rfc1950 - ZLIB Compressed Data Format Specification version 3.3
  - rfc1052 - GZIP file format specification version 4.3
  - rfc1105 - A Border Gateway Protocol (BGP)
  - ⊕ Notes for rfc1105
    - See rfc2283 & rfc1136 etc
  - rfc1136 - Administrative Domains and Routing Domains A Model for Routing in the Internet
  - ⊕ Notes for rfc1136
    - See rfc2283 & rfc1267 etc
  - rfc1267 - A Border Gateway Protocol 3 (BGP-3)
  - ⊕ Notes for rfc1267
    - See rfc2283 & rfc1654 etc
  - rfc1654 - A Border Gateway Protocol 4 (BGP-4)
  - ⊕ Notes for rfc1654
    - See rfc2283 & rfc1771 etc
  - rfc1771 - A Border Gateway Protocol 4 (BGP-4)
  - ⊕ Notes for rfc1771
    - See rfc2283 & rfc4271 etc
  - rfc1939 - Post Office Protocol - Version 3
  - rfc1951 - DEFLATE Compressed Data Format Specification version 1.3
  - rfc2045 - Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
  - rfc2047 - MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text
  - rfc2109 - HTTP State Management Mechanism
  - rfc2253 - Lightweight Directory Access Protocol (v3): UTF-8 String Representation of Distinguished Names
  - rfc2282 - Internet Message Format
  - ⊕ Notes for rfc2282
    - Obsoleted by rfc5322
    - Updated by rfc5335, rfc5336
  - rfc2283 - Multiprotocol Extensions for BGP-4
  - ⊕ Notes for rfc2283
    - But see rfc2858 etc
  - rfc2292 - Advanced Sockets API for IPv6
  - rfc2307 - An Approach for Using LDAP as a Network Information Service
  - rfc2328 - OSPF Version 2
  - ⊕ Notes for rfc2328
    - See also rfc5340
  - rfc2426 - vCard MIME Directory Profile
  - rfc2428 - FTP Extensions for IPv6 and NATs
  - rfc2445 - Internet Calendaring and Scheduling Core Object Specification (iCalendar)
  - rfc2483 - RI Resolution Services Necessary for URN Resolution
  - rfc2518 - HTTP Extensions for Distributed Authoring -- WEBDAV
  - rfc2616 - Hypertext Transfer Protocol -- HTTP/1.1
  - rfc2822 - Internet Message Format
  - rfc2858 - Multiprotocol Extensions for BGP-4
  - ⊕ Notes for rfc2858
    - See also rfc4760
  - rfc3066 - Tags for the Identification of Languages
  - rfc3161 - Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)
  - rfc3164 - The BSD syslog Protocol
  - rfc3261 - SIP: Session Initiation Protocol
  - rfc3339 - For Date and Time on the Internet: Timestamps
  - rfc3394 - Advanced Encryption Standard (AES) Key Wrap Algorithm
  - rfc3492 - Punycode: A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)
  - rfc3501 - INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1
  - rfc3548 - The Base16, Base32, and Base64 Data Encodings
  - rfc3966 - The tel URI for Telephone Numbers
  - rfc3986 - Uniform Resource Identifier (URI): Generic Syntax
  - rfc3987 - Internationalized Resource Identifiers (IRIs)
  - rfc4217 - Securing FTP with TLS
  - rfc4234 - Augmented BNF for Syntax Specifications: ABNF
  - ⊕ Notes for rfc4234
    - But see rfc5234
  - rfc4271 - A Border Gateway Protocol 4 (BGP-4)
  - ⊕ Notes for rfc4271
    - See also rfc2283
  - rfc4287 - The Atom Syndication Format
  - rfc4506 - XDR: External Data Representation Standard
  - rfc4512 - Lightweight Directory Access Protocol (LDAP): Directory Information Models
  - rfc4514 - Lightweight Directory Access Protocol (LDAP): String Representation of Distinguished Names
  - rfc4517 - Lightweight Directory Access Protocol (LDAP): Syntaxes and Matching Rules
  - rfc4648 - The Base16, Base32, and Base64 Data Encodings
  - rfc4760 - Multiprotocol Extensions for BGP-4
  - rfc4791 - Calendaring Extensions to WebDAV (CalDAV)
  - rfc4918 - HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)
  - rfc5234 - Augmented BNF for Syntax Specifications: ABNF
  - rfc5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile
  - rfc5322 - Internet Message Format
  - rfc5340 - OSPF for IPv6
  - ⊕ Notes for rfc5340
    - See also rfc2328
  - rfc5544 - Syntax for Binding Documents with Time-Stamps
  - rfc5545 - Internet Calendaring and Scheduling Core Object Specification (iCalendar)
  - rfc5652 - Cryptographic Message Syntax (CMS)
  - rfc5731 - Extensible Provisioning Protocol (EPP) Domain Name Mapping
  - rfc5890 - nternationalized Domain Names for Applications (IDNA): Definitions and Document Framework
  - rfc6238 - TOTP: Time-Based One-Time Password Algorithm
  - rfc6265 - HTTP State Management Mechanism
  - rfc6266 - Use of the Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP)
  - rfc6455 - The WebSocket Protocol
  - rfc6480 - An Infrastructure to Support Secure Internet Routing
  - rfc6570 - URI Template
  - rfc6638 - Scheduling Extensions to CalDAV
  - rfc6811 - BGP Prefix Origin Validation
  - rfc6854 - Update to Internet Message Format to Allow Group Syntax in the "From:" and "Sender:" Header Fields
  - rfc6901 - JavaScript Object Notation (JSON) Pointer
  - rfc6902 - JavaScript Object Notation (JSON) Patch
  - rfc7047 - The Open vSwitch Database Management Protocol
  - rfc7049 - Concise Binary Object Representation (CBOR)
  - rfc7230 - Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing
  - rfc7231 - Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
  - rfc7232 - Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests
  - rfc7233 - Hypertext Transfer Protocol (HTTP/1.1): Range Requests
  - rfc7234 - Hypertext Transfer Protocol (HTTP/1.1): Caching
  - rfc7235 - Hypertext Transfer Protocol (HTTP/1.1): Authentication
  - rfc7540 - Hypertext Transfer Protocol Version 2 (HTTP/2)
  - rfc7564 - PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols
  - rfc7578 - Returning Values from Forms: multipart/form-data
  - rfc7692 - Compression Extensions for WebSocket
  - rfc7764 - Guidance on Markdown: Design Philosophies, Stability Strategies, and Select Registrations
  - rfc8536 - The Time Zone Information Format (TZif)
  - rfc8555 - Automatic Certificate Management Environment (ACME)
  - rfc8984 - A JSON Representation of Calendar Data
  - rfc8555 - Automatic Certificate Management Environment
  - rfc8601 - Message Header Field for Indicating Message Authentication Status
  - rfc9075 - Report from the IAB COVID-19 Network Impacts Workshop 2020
  - rfc9110 - HTTP Semantics
  - rfc9154 - Extensible Provisioning Protocol (EPP) Secure Authorization Information for Transfer
  - rfc9553 - JSContact: A JSON Representation of Contact Data
  - rfc9554 - vCard Format Extensions for JSContact
  - rfc9555 - SContact: Converting from and to vCard
  - rfc9557 - Date and Time on the Internet: Timestamps with Additional Information
  - rfc9562 - Universally Unique IDentifiers (UUIDs)
  - rfc9651 - Structured Field Values for HTTP
- TheWindowGuide
  - ⊕ See also
    - [Topic]
    - [Topic]
- TiddlyWikis
  - ⊕ See also
- ToonLanguage
  - ⊕ See also
    - [Topic]
    - https://en.wikipedia.org/wiki/Token-Oriented_Object_Notation
  - Data::TOON - Complete Perl implementation of TOON (Token-Oriented Object Notation)
  - TOON - Token-Oriented Object Notation for Perl
  - TOON::XS - Token-Oriented Object Notation for Perl in XS
  - ⊕ Notes for TOON::XS
    - See also Data::TOON
- UninstallModule
  - App::pmuninstall - Uninstall modules
- UserInfo
  - User::Identity - Maintain info about a physical person
  - ⊕ Notes for User::Identity
    - Contains Mail::Identity
  - User::Information - Generic module for extracting information from user accounts
- UserInput
  - IO::Prompt::Hooked - Simple prompting with validation hooks
  - IO::Prompt::Simple - Provide a simple user input
  - IO::Prompt::Tiny - Prompt for user input with a default option
  - IO::Prompter - Prompt for input, read it, clean it, return it
- UsernamePassword
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - for OpenID Connect
    - https://savage.net.au/misc/Digital.Security.Wiki.html
  - Amazon::Credentials - Fetch Amazon credentials from file, environment or role
  - App::genpw - (Gen)erate random password/strings, with (p)atterns and (w)ordlists
  - ⊕ Notes for App::genpw
    - Contains script genpw similar to Linux's genpw
  - Auth::GoogleAuth - Google Authenticator TBOT Abstraction
  - Authen::TacacsPlus - Perl extension for authentication using tacacs+ server
  - Authen::TOTP - Interface to RFC6238 two factor authentication (2FA)
  - ⊕ Notes for Authen::TOTP
    - See also Trog::TOTP
  - Concierge - Service layer orchestrator for authentication, sessions, and user data
  - Concierge::Auth - Password authentication and token generation using Crypt::Passphrase
  - Concierge::Sessions - Session manager with factory pattern and multiple backend support
  - Concierge::Users - User data management with multiple storage backends
  - Config::Identity - Load (and optionally decrypt via GnuPG) user/pass identity information
  - ⊕ Notes for Config::Identity
    - Uses GnuPG as gpg
    - Use with gpg-agent
    - For GitHub API access, an identity is a login/token pair
    - For PAUSE access, an identity is a user/password pair
  - Data::Password::Common - Check a password against a list of common passwords
  - Data::Password::Manager - Generate, check, manage crypt - des passwords
  - DBIx::Array::Connect - Database Connections from an INI Configuration File
  - DBIx::MyPassword - Store database authentication info in a CSV file
  - DBIx::Password - Allows you to create a global password file for DB password
  - DBIx::PasswordIniFile - Manages DBI connections with password and other params stored in a .ini style file
  - File::KDBX - Encrypted database to store secret text and files
  - ⊕ Notes for File::KDBX
    - Works like KeePassXC (https://github.com/keepassxreboot/keepassxc)
  - GitHub::Config::SSH::UserData - Read user data from comments in ssh config file
  - KeePass::Reader - Interface to KeePass V4 database files
  - ⊕ Notes for KeePass::Reader
    - See also File::KDBX above
  - Module::Features::PasswordManager - Password manager is a tool that lets you input, store, and retrieve individual passwords securely
  - MooX::Role::CryptedPassword - Password attribute from a encrypted file
  - Net::SAML2 - SAML2 bindings and protocol implementation
  - Pass::OTP - Perl implementation of HOTP / TOTP algorithms
  - Password::Policy - Make managing multiple password strength profiles easy
  - String::Mask - Mask sensitive data
  - String::Mask::XS - Mask sensitive data faster
  - String::Secret - Secret string wrapper to mask secret from logger
  - Tags::HTML::ChangePassword - Tags helper for change password
  - Tags::HTML::Login::Access - Tags helper for login access
  - Tags::HTML::Login::Register - Tags helper for login register
  - ⊕ Notes for Tags::HTML::Login::Register
    - Helps generate code for CSS and HTML Login form
  - Text::Password::Pronounceable - Generate pronounceable passwords
  - Trog::TOTP - Fork of Authen::TOTP
  - URN::OASIS::SAML2 - Constants for urn:oasis SAML2 implementations
  - ⊕ Notes for URN::OASIS::SAML2
    - SAML 2.0 (Security Assertion Markup Language 2.0) is an open standard that enables secure Single Sign-On (SSO) for web-based applications
  - WebService::HashiCorp::Vault - Perl API for HashiCorp's Vault
  - Win32::Credentials - Read/Write Windows Credential Manager via Win32 API
  - WWW::Zitadel - Perl client for Zitadel identity management (OIDC + Management API)
  - ⊕ Notes for WWW::Zitadel
    - https://zitadel.com/
  - WWW::Zitadel::OIDC - OIDC client for Zitadel - token verification, JWKS, discovery
- UTF8
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - For utf8proc
    - https://github.com/tsibley/tchrist-OSCON2011-Unicode
    - https://metacpan.org/pod/perlunicode
    - https://metacpan.org/pod/perluniintro
    - https://metacpan.org/pod/perlunitut
    - STDERR->binmode(":encoding(UTF-8)");
    - binmode STDIN, ":encoding(UTF-8)";
    - binmode STDOUT, ":encoding(UTF-8)";
    - binmode STDERR, ":encoding(UTF-8)";
    - https://metacpan.org/pod/perlunicode#Forcing-Unicode-in-Perl-(Or-Unforcing-Unicode-in-Perl)
    - https://stackoverflow.com/questions/6162484/why-does-modern-perl-avoid-utf-8-by-default/6163129#6163129
    - https://www.unicode.org/versions/Unicode16.0.0/
    - https://www.unicode.org/reports/tr44/
    - https://www.endpointdev.com/blog/2025/04/encoding-in-perl/
  - App::safer - CLI for Text::Safer
  - App::uniprint - Print each Unicode character of input, along with its codepoint and name
  - Encode - Character encodings in Perl
  - ⊕ Notes for Encode
    - But see the previous entry's warning
  - Encode::Byte - Single Byte Encodings
  - Encode::CN - China-based Chinese Encodings
  - Encode::EBCDIC - EBCDIC Encodings
  - Encode::Guess - Guesses encoding from data
  - Encode::JP - Japanese Encodings
  - Encode::KR - Korean Encodings
  - Encode::Simple - Encode and decode text, simply
  - Encode::Symbol - Symbol Encodings
  - Encode::TW - Taiwan-based Chinese Encodings
  - Encode::UTF8Mac - "utf-8-mac" a variant utf-8 used by OSX filesystem
  - Encode::Wide - Convert wide characters (Unicode) into HTML or XML-safe ASCII entities
  - ODF::lpOD_Helper - Fix and enhance ODF::lpOD
  - ⊕ Notes for ODF::lpOD_Helper
    - Associated code
    - ODF::lpOD - An OpenDocument management interface
    - https://metacpan.org/pod/ODF::lpOD
  - Sys::Binmode - A fix for Perlâs system call character encoding
  - Text::Iconv - Perl interface to iconv() codeset conversion function
  - Text::PO - Read and write PO files with multi-lingual messages
  - Text::Safer - Convert text with one of several available methods, usually to a safer/more restricted encoding, e.g. for filenames
  - Text::StripAccents - Removes accented & special characters from strings
  - ⊕ Notes for Text::StripAccents
    - But see Text::Unaccent
  - Text::Transliterator::Unaccent - Compile a transliterator from Unicode tables, to remove accents from text
  - Text::VisualPrintf - Printf family functions to handle Non-ASCII characters
  - Text::Unaccent - Remove accents from a string
  - ⊕ Notes for Text::Unaccent
    - Has a C dependency
    - See Text::StripAccents above
  - Text::Unidecode - Plain ASCII transliterations of Unicode text
  - Text::WideChar::Util - Routines for text containing wide characters
  - ⊕ Notes for Text::WideChar::Util
    - Module contains a See Also
  - Unicode::Tussle - Tom's Unicode Scripts So Life is Easier
  - ⊕ Notes for Unicode::Tussle
    - Sample usage
  - Unicode::Block::List - Access to Unicode Block names and tables
  - Unicode::CheckUTF8 - Checks if scalar is valid UTF-8
  - Unicode::Collate - Notes copied from the synopsis
  - Unicode::Escape - Escape and unescape Unicode characters other than ASCI
  - Unicode::GCString - String as Sequence of UAX #29 Grapheme Clusters
  - Unicode::Normalize - Unicode Normalization Forms
  - Unicode::Precis - RFC 7564 PRECIS Framework - Enforcement and Comparison
  - ⊕ Notes for Unicode::Precis
    - See TheRFCGuide for rfc7564
  - Unicode::Precis::Preparation - RFC 8264 PRECIS Framework - Preparation
  - Unicode::Stringprep - Preparation of Internationalized Strings (RFC 3454)
  - Unicode::Towctrans - Generate Wide-Char Unicode Case Mapping Tables
  - Unicode::Unihan - The Unihan Data Base 5.1.0
  - Unicode::UTF8 - Encoding and decoding of UTF-8 encoding form
  - utf8::all - Turn on Unicode - all of it
  - UTF8::R2 - Makes UTF-8 scripting easy for enterprise use
- UtilityStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - http://opensearch.org/
  - App::PerlGlue - Glue messy text into useful shapes
  - App::plockf - Execute a command while holding a file lock
  - FastGlob - A faster glob() implementation
  - Metabase - A database framework and API for resource metadata
  - Metabase::Backend::AWS - Metabase backend implemented using Amazon Web Services
  - Metabase::Backend::MongoDB - Metabase backend implemented using MongoDB
  - Metabase::Backend::SQL - Metabase backend role for SQL-based backends
  - Metabase::Client::Simple - A client that submits to Metabase servers
  - Metabase::Fact - Base class for Metabase Facts
  - Metabase::Index - Interface for Metabase indexing
  - Metabase::Librarian - Front-end interface to Metabase storage
  - Metabase::Query - Generic Metabase query language role
  - Metabase::Report - A base class for collections of Metabase facts
  - Metabase::Web - The Metabase web service
  - Mo::utils::Array - Mo array utilities
  - Mo::utils::Binary -
  - Mo::utils::common - Common subroutines for Mo::utils framework.
  - Mo::utils::Currency - Mo currency utilities
  - Mo::utils::IRI - Mo utilities for IRI
  - Mo::utils::Number - Mo number utilities
  - Mo::utils::Perl - Mo Perl utilities
  - Mo::utils::UDC - Mo utilities for Universal Decimal Classification
  - Module::Version - Get module versions
  - PAX - Perl Adaptive eXecution compiler and standalone binary packager
  - perlport - Writing portable Perl
  - perlwhich - Locate a Perl module
  - ⊕ Notes for perlwhich
    - But see App::PMUtils
  - Search::Dict - Look - search for key in dictionary file
  - Search::Query - Polyglot query parsing
  - Search::Query::Parser - Convert query strings into query objects
  - Search::Tools - High-performance tools for building search applications
  - Task::Devel::Essentials - Bundle of modules useful for developers
  - Unit::Duration - Work-time unit duration conversion and canonicalization
- UUID
  - ⊕ See also
    - [Topic]
    - https://en.wikipedia.org/wiki/Apophis
    - https://en.wikipedia.org/wiki/Horus
    - https://en.wikipedia.org/wiki/Sekhmet
    - https://en.wikipedia.org/wiki/Universally_unique_identifier
    - http://e2fsprogs.sourceforge.net/
    - https://github.com/ulid/spec
  - Apophis - Content-addressable storage with deterministic UUID v5 identifiers
  - Data::GUID - Globally unique identifiers
  - Data::GUID::Any - Generic interface for GUID/UUID creation
  - Data::KSUID - K-Sortable Unique IDentifiers
  - ⊕ Notes for Data::KSUID
    - https://github.com/segmentio/ksuid
  - Data::ULID - Universally Unique Lexicographically Sortable Identifier
  - ⊕ Notes for Data::ULID
    - See also ULID::Tiny below
  - Data::UUID - Globally/Universally Unique Identifiers (GUIDs/UUIDs)
  - Data::UUID::LibUUID - uuid.h based UUID generation (versions 2 and 4 depending on platform)
  - Data::UUID::MT - Fast random UUID generator using the Mersenne Twister algorithm
  - Horus - Ultra-fast XS UUID/GUID generator supporting all RFC 9562 versions
  - Sekhmet - Ultra-fast XS ULID generator built on Horus
  - ULID::Tiny - A lightweight ULID (Universally Unique Lexicographically Sortable Identifier) generator
  - ⊕ Notes for ULID::Tiny
    - See also Data::ULID above
  - UUID - DCE compatible Universally Unique Identifier library for Perl
  - UUID::Random - Generate random uuid strings
  - UUID::Random::Patch::UseMRS - Make UUID::Random use Math::Random::Secure's rand()
  - UUID::Random::Secure - Like UUID::Random, but uses Math::Random::Secure for random numbers
  - UUID::Tiny - Pure Perl UUID Support With Functional Interface
  - ⊕ Notes for UUID::Tiny
    - Warning: Low quality. But see UUID::Tiny::Patch::UseMRS below
  - UUID::Tiny::Patch::UseMRS - Make UUID::Tiny use Math::Random::Secure's rand()
  - UUID::URandom - UUIDs based on /dev/urandom or the Windows Crypto API
  - UUID4::Tiny - Cryptographically secure v4 UUIDs for Linux x64
  - ⊕ Notes for UUID4::Tiny
    - https://github.com/ulid/spec
- VersionControl
  - ⊕ See also
    - [Topic]
    - http://en.wikipedia.org/wiki/Source_Code_Control_System
  - VCI - A library for interacting with version-control systems.
  - VCI::Abstract::History - The history of a Project, File, Directory, etc
  - VCI::Abstract::Project - A particular project in the Repository
  - VCI::Abstract::Repository - A repository where version-controlled items are kept
  - VCI::VCS::Git - Object-oriented interface to Git
  - VCS::SCCS - OO Interface to SCCS files
- VersionWare
  - ⊕ See also
    - [Topic]
    - for libversion
    - For Semantic Versioning
    - https://semver.org/spec/v2.0.0.html
  - Perl::Version - Parse and manipulate Perl version strings
  - Perl::Version::Bumper - Update use VERSION on any Perl code
  - ⊕ Notes for Perl::Version::Bumper
    - Note: This works on Perl versions, not module versions
  - SemVer - Use semantic version numbers
  - SemVer::V2::Strict - Semantic version v2.0 object for Perl
  - version - Perl extension for Version Objects
  - version::AlphaBeta - Use alphanumeric version objects
  - V - Print version of the specified module(s)
  - Version::Dotted - Bump a dotted version, check if version is trial
  - Version::Dotted::Semantic - (Adapted) Semantic Versioning
  - Version::libversion::PP - Pure-Perl porting of libversion
  - Version::libversion::XS - Perl binding for libversion
  - Version::Next - Increment module version numbers simply and correctly
  - Version::Semantic - Tiny SemVer based class implementation
- VirtualMachines
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - Alien::aep - Allows you to run a command within a container and control its start up
  - API::Docker - Perl client for the Docker Engine API
  - App::dozo - Docker with Zero Overhead
  - Net::Proxmox::VE - Pure Perl API for Proxmox Virtual Environment
  - Protocol::OVSDB - Implementation of RFC 7047 (Open vSwitch Database Management protocol)
  - Protocol::Sys::Virt - Abstract LibVirt protocol implementation
  - SIRTX::Datecode - Module for interacting with SIRTX Datecodes
  - SIRTX::Font - Module for working with SIRTX font files
  - ⊕ Notes for SIRTX::Font
    - It's here because I could not think of where else to put it
  - SIRTX::VM - Module for interacting with SIRTX VM code
  - SIRTX::VM::Chunk - Module for interacting with SIRTX VM chunks
  - Sys::Async::Virt - LibVirt protocol implementation for clients
  - Sys::Async::Virt::Connection::TLS - Connection to LibVirt server over TLS sockets
  - Sys::Virt - Represent and manage a libvirt hypervisor connection
  - ⊕ Notes for Sys::Virt
    - See also https://libvirt.org/
  - VM::EC2 - Perl interface to Amazon EC2, Virtual Private Cloud, Elastic Load Balancing, Autoscaling, and Relational Database services
  - WWW::Docker - Perl client for the Docker Engine API
- WantArray
  - Want - Extends wantarray
  - Wanted - Extended caller context detection
  - ⊕ Notes for Wanted
    - It seems Want is no longer maintained
- WeatherStuff
  - ⊕ See also
  - Ham::NOAA::Sunspot - Process sunspot prediction data from NOAA FTP/Website
  - NOAA::Aurora - Simple client for NOAA's Aurora Forecast Service
  - Weather::API::Base - Base/util module for Weather API clients
  - Weather::Astro7Timer - Simple client for the 7Timer.info Weather Forecast service
  - Weather::Meteo - Interface to https://open-meteo.com for historical weather data
  - Weather::OWM - Perl client for the OpenWeatherMap (OWM) API
  - Weather::WeatherKit - Apple WeatherKit REST API client
- WebSecurity
  - App::OATH - Simple OATH authenticator
  - Authen::OATH - OATH One Time Passwords
  - HTTP::CSPHeader - Manage dynamic content security policy headers
  - HTTP::SecureHeaders - Manage security headers with many safe defaults
  - Net::OAuth - Provides a low-level API for reading and writing OAuth messages
  - WWW::OAuth - Portable OAuth 1.0 authentication
- WebServices
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - https://avahi.org/
    - https://datadome.co/threat-research/how-new-headless-chrome-the-cdp-signal-are-impacting-bot-detection/
    - https://letsencrypt.org/
    - For Amateur Radio Country Files
    - A simple TCP client-server
    - For a great overview of mDNS, ZeroConf, etc
    - For Net::Gotify's sms
    - For Cloud API documentation
    - https://www.dropbox.com/developers/documentation/http/documentation
    - https://www.fastly.com/documentation/reference/api/
    - For RPC docs
    - For perlrcpgen
    - For NATS
    - https://snipeitapp.com/
    - Monitorix
    - Vault. Secret handling
  - Adam - The patriarch of IRC Bots
  - AnyEvent::SparkBot - Cisco Spark WebSocket Client for the AnyEvent Loop
  - AnyEvent::XMPP - An implementation of the XMPP Protocol
  - ⊕ Notes for AnyEvent::XMPP
    - See also Protocol::XMPP
  - API::Eulerian - Marketing Services
  - ⊕ Notes for API::Eulerian
    - https://www.eulerian.com/
  - App::DistSync - Utility for synchronizing distribution mirrors
  - App::ElasticSearch::Utilities - Utilities for Monitoring ElasticSearch
  - App::KGB - Collaborative IRC helper
  - Authen::Radius - Provide simple Radius client facilities
  - App::Wax - Webify your CLI
  - App::LastStats - A module to fetch and display Last.fm statistics
  - Backblaze::B2V4 - Client library for the Backblaze B2 Cloud Storage Service V4 API
  - BBS::Universal - A Perl based TCP-IP BBS catering to retro computers and that modem experience
  - BitTorrent::Simple - A simple BitTorrent client
  - Bot::IRC - Yet Another IRC Bot
  - Bot::IRC::X::Dice - Bot::IRC plugin for dice rolling
  - Bot::IRC::X::Feeds - Bot::IRC plugin to watch and notify on changes in RSS feeds
  - Bot::IRC::X::ManagementSpeak - Bot::IRC plugin for rendering management-speak
  - Bot::IRC::X::Message - Bot::IRC plugin for leaving messages for nicks
  - Bot::IRC::X::MetarTaf - Bot::IRC plugin for METAR and TAF reporting
  - Bot::IRC::X::Reminder - Bot::IRC plugin for scheduling reminders
  - Bot::IRC::X::Retort - Bot::IRC plugin for bot-retorting to key words
  - Bot::IRC::X::Time - Bot::IRC plugin for some time functions
  - Bot::IRC::X::UriTitle - Bot::IRC plugin to parse and print URI titles
  - Bot::IRC::X::WwwShorten - Bot::IRC plugin for automatic URL shortening
  - BZ::Client - A client for the Bugzilla web services API
  - Data::JPack - Offline/Online Web application and data system
  - DeyeCloud::Client - This module implements all operations as described in the Deye Cloud developer guide (and some operations not described)
  - ⊕ Notes for DeyeCloud::Client
    - https://developer.deyecloud.com/api
  - Extism - Perl SDK for WebAssembly https://extism.org/
  - Feed::Data - Dynamic data feeds
  - Feed::Data::AlJazeera - AlJazeera RSS feeds
  - Feed::Data::BBC - BBC RSS feeds
  - Feed::Data::CNN - CNN rss feeds
  - Grpc::XS - Binding to the grpc library
  - GDPR::IAB::TCFv2 - Transparency & Consent String version 2 parser
  - ⊕ Notes for GDPR::IAB::TCFv2
    - See [[Acronyms]] for GDPR & IAB
  - Google::ProtocolBuffers::Dynamic - Fast and complete protocol buffer implementation
  - Ham::DXCC::Lookup - Look up DXCC entity from amateur radio callsign
  - IO::Socket::HappyEyeballs - RFC 8305 Happy Eyeballs v2 connection algorithm
  - ⊕ Notes for IO::Socket::HappyEyeballs
    - See TheRFCGuide for rfc8305
  - IP::Info - Interface to IP geographic and network data
  - IRI - Internationalized Resource Identifiers
  - LWP - The World-Wide Web library for Perl
  - Marky - Web application for bookmark databases
  - Masscan::Client - A Perl module which helps in using the masscan port scanner
  - Masscan::Scanner - A Perl module which helps in using the masscan port scanner
  - MCP::K8s - MCP Server for Kubernetes with RBAC-aware dynamic tools
  - Meetup::API - Interface to the Meetup API
  - Monit::HTTP - An OOP interface to Monit
  - Museum::Rijksmuseum::Object - Access the Rijksmuseum object metadata API
  - Muster - Web application for content management
  - Net::Async::Gearman - Use Gearman with IO::Async
  - ⊕ Notes for Net::Async::Gearman
    - See also Net::Gearman below
  - Net::Async::Hetzner - Async Hetzner API clients for IO::Async
  - Net::Async::WebSearch - IO::Async multi-provider web search aggregator
  - Net::Async::NATS - Async NATS client for IO::Async
  - Net::Azure::NotificationHubs - A Client Class for Azure Notification Hubs
  - Net::BCCN - Broadcast Channel Notifications protocol
  - Net::BitTorrent::DHT - Kademlia-like DHT Node for BitTorrent
  - Net::BitTorrent::Protocol::BEP03::Bencode - Utility functions for BEP03: The BitTorrent Protocol Specification
  - Net::Blossom - Perl client and protocol support for Blossom
  - Net::Blossom::Server - Server-side support for the Blossom protocol
  - Net::Blossom::Server::Backend::Postgres - Postgres storage backend for Blossom servers
  - Net::Blossom::Server::Backend::SQLite - SQLite storage backend for Blossom servers
  - Net::Bonjour - Module for DNS service discovery via multicast DNS (mDNS)
  - Net::CampaignMonitor - A Perl wrapper for the Campaign Monitor API
  - Net::Checkpoint::Management::v1 - Checkpoint Management API version 1.x client library
  - Net::Cisco::FMC::v1 - Cisco Firepower Management Center (FMC) API version 1 client library
  - Net::Correios - Acesse a API REST dos Correios
  - ⊕ Notes for Net::Correios
    - This module provides a way to query the Brazilian Postal Office (Correios)
  - Net::CUPS - Common Unix Printing System Interface
  - Net::DAVTalk - Interface to talk to DAV servers
  - Net::DNS - Perl Interface to the Domain Name System
  - Net::eBay - Perl Interface to XML based eBay API.
  - Net::Flickr::Backup - OOP for backing up your Flickr photos locally
  - Net::Gearman - Provide a synchronous concrete Gearman implementation
  - ⊕ Notes for Net::Gearman
    - See also Net::Async::Gearman above
  - Net::Gotify - Gotify client for Perl
  - Net::Ident - Lookup the username on the remote end of a TCP/IP connection
  - Net::Jabber::Bot - Automated Bot creation with safeties
  - Net::IPData - Perl client for the ipdata.co IP geolocation and threat intelligence API
  - Net::Multicast::PeerDiscovery - Local Peer Discovery via UDP Multicast
  - Net::Rendezvous::Publish - Publish Rendezvous services
  - Net::Rendezvous::Publish::Backend::Avahi - Publish zeroconf data via Avahi
  - Net::Silverpeak::Orchestrator - Silverpeak Orchestrator REST API client library
  - Net::uTP - Micro Transport Protocol (Î¼TP, BEP 29)
  - Novel::Robot::Parser - Get novel / bbs content from website
  - NVM::Perl - Node.js version manager
  - OcToolkit - Open Cloud Toolkit. Helm like tool for Openshift and Kubernetes with multi cluster support
  - OIDC::Client - OpenID Connect Client
  - OIDC::Lite::Client::WebServer - OpenID Connect Web Server Profile Client
  - OpenSearch::Client - An unofficial Perl client for OpenSearch
  - ⊕ Notes for OpenSearch::Client
    - See also Search::OpenSearch
  - OpenSearch::Client::Hash - A utility to create password hashes
  - Opsview::RestAPI - Interact with the Opsview Rest API interface
  - Playwright - Perl client for Playwright
  - ⊕ Notes for Playwright
    - Playwright is a Perl interface to a lightweight node.js webserver
    - See https://playwright.dev/
  - Protobuf - Namespace reservation for Google's Protocol Buffers
  - ⊕ Notes for Protobuf
    - http://code.google.com/p/protobuf/
  - Protocol::XMPP - Protocol-level support for XMPP interaction
  - ⊕ Notes for Protocol::XMPP
    - See also AnyEvent::XMPP
  - Razor2::Client::Agent - Collaborative, content-based spam filtering network agent
  - Remote::Perl - Run Perl scripts on remote machines over any pipe transport
  - Role::REST::Client - REST Client Role
  - RPC::ONC - Perl interface to ONC RPC
  - Search::Elasticsearch - The official client for Elasticsearch
  - ⊕ Notes for Search::Elasticsearch
    - But see Search::OpenSearch
  - Search::OpenSearch - Provide search results in OpenSearch format
  - ⊕ Notes for Search::OpenSearch
    - See also OpenSearch::Client
  - Search::Xapian - Perl XS frontend to the Xapian C++ search library
  - SEO::Inspector - Run SEO checks on HTML or URLs
  - Shipment - Interface to Popular Shipping Services
  - ⊕ Notes for Shipment
    - Contains 999 modules!
  - Sietima - Minimal mailing list manager
  - SignalWire::Agents - SignalWire is a cloud-based communication platform (CPaaS)
  - SimpleFlow - Easy, simple workflow manager (and logger)
  - SmsAero - Send SMS via smsaero.ru
  - SMS::AQL - Perl extension to send SMS text messages via AQL's SMS service
  - ⊕ Notes for SMS::AQL
    - Provides an object-oriented interface to send SMS messages via the HTTP gateway provided by AQ Ltd (www.aql.com) in the UK
  - Socket::MsgHdr - Sendmsg, recvmsg and ancillary data operations
  - ⊕ Notes for Socket::MsgHdr
    - See TheRFCGuide for rfc2292
  - StreamFinder - Fetch actual raw streamable URLs from various radio-station, video & podcast websites
  - Tailscale - Perl bindings for tailscale-rs
  - ⊕ Notes for Tailscale
    - https://github.com/tailscale/tailscale-rs
  - Telegram::Bot - A base class to make your very own Telegram bot
  - URI::tel - Implementation of rfc3966 for tel URI - Telephone numbers
  - ⊕ Notes for URI::tel
    - See TheRFCGuide for rfc3966
  - VAPID - Voluntary Application Server Identification
  - WebService::AbuseIPDB - Client for the API (version 2) of AbuseIPDB
  - WebService::Bugzilla - Perl API for Bugzilla REST API
  - WebService::Careerjet - Perl interface to Careerjet's public job search API
  - WebService::Client - A base role for quickly and easily creating web service clients
  - ⊕ Notes for WebService::Client
    - POD contains a number of examples built using this module
  - WebService::Dropbox - Perl interface to Dropbox API
  - WebService::Fastly - An interface to most facets of the Fastly API
  - WebService::HashiCorp::Vault - Perl API for HashiCorp's Vault
  - WebService::IdoitAPI - A library to access the i-doit JSON RPC API
  - Webservice::InternetDB::API - Fast IP Lookups for Open Ports and Vulnerabilities using InternetDB API
  - ⊕ Notes for Webservice::InternetDB::API
    - Uses https://internetdb.shodan.io/
    - Refers to https://www.freepublicapis.com/
  - Webservice::KeyVal::API - Perl API client for the REPLACE API service, https://keyval.org/
  - WebService::OpenStates - Client for the Plural Open States API
  - ⊕ Notes for WebService::OpenStates
    - State-level legislator information for US locations, provided via the Plural Open States API
  - WebService::OPNsense - Perl client library for the OPNsense REST API
  - ⊕ Notes for WebService::OPNsense
    - https://docs.opnsense.org/development/api.html
  - WebService::OurWorldInData - Connect with the Our World in Data API
  - WebService::Simple - Simple Interface To Web Services APIs
  - WebService::Slack::WebApi - A simple wrapper for Slack Web API
  - ⊕ Notes for WebService::Slack::WebApi
    - New doc site: https://docs.slack.dev/
    - Old doc site: https://api.slack.com/web
  - WebService::TogetherWeRemember - Together We Remember!
  - ⊕ Notes for WebService::TogetherWeRemember
    - https://togetherweremember.com/
  - WebService::YTSearch - Search YouTube
  - Weenect - API to Weenect tracker server
  - Workflow - Simple, flexible system to implement workflows
  - WWW::Bizowie::API - Perl API interface to Bizowie's erp software
  - WWW::Bund - Perl client for German Federal Government APIs (bund.dev)
  - WWW::Codeguard - Perl interface to interact with the Codeguard API
  - ⊕ Notes for WWW::Codeguard
    - https://www.codeguard.com/
  - WWW::Crawl - A simple web crawler for extracting links and more from web pages
  - WWW::FetchStory - Fetch a story from a fiction website
  - WWW::Hetzner - Perl client for Hetzner APIs (Cloud, Storage, Robot)
  - WWW::Picnic - Library to access Picnic Supermarket API
  - WWW::RobotRules - Database of robots.txt-derived permissions
  - WWW::RobotRules::Extended - Database of robots.txt-derived permissions. This is a fork of WWW::RobotRules
  - WWW::Shodan::API - https://metacpan.org/dist/WWW-Shodan-API
  - WWW::SnipeIT - API Access to Snipe-IT
  - ⊕ Notes for WWW::SnipeIT
    - Snipe-IT is an asset inventory management system
  - WWW::Spotify - Spotify Web API Wrapper
  - WWW::Tumblr - Perl bindings for the Tumblr API
  - WWW::Vonage::API - Accessing Vonage's REST API with Perl
  - WWW::YaCyBlacklist - A Perl module to parse and execute YaCy blacklists
  - ⊕ Notes for WWW::YaCyBlacklist
    - YaCy (pronounced "ya see") is a fascinating project: a free, distributed, peer-to-peer (P2P) search engine
  - XML::Compile - Compilation based XML processing
  - XML::Compile::WSS - OASIS Web Services Security
  - XML::Compile::WSS::Signature - This extension implements cypto signatures
  - Zabbix7::API - Access the JSON-RPC API of a Zabbix server
  - ⊕ Notes for Zabbix7::API
    - Zabbix is an enterprise-class open source distributed monitoring solution
- WeirdAndWonderful
  - ⊕ See also
    - https://metacpan.org/dist/Language-l33t/view/lib/Language/l33t/Specifications.pod
    - https://en.wikipedia.org/wiki/Tl%C3%A1loc
  - Acme::Onion - .ð§ file extension in Perl
  - Acme::Shotgun - Shoots holes in files
  - Ancient - Ancient Perl utilities
  - Bored - Do nothing, but with XS
  - Getopt::WonderBra - Lift and Separate Command Line Options
  - HereDocs - Multi-line data embedded in source code
  - Language::l33t - A l33t interpreter
  - Nobody::Util - Utilities Nobody Uses
  - Prelude - Is an on-demand operator that can easily compose actions on potentially very large amount of data
  - Tlaloc - Wetness magic on Perl scalars, blessed by the Aztec rain god
- WikiStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - http://www.kwiki.org
    - This tool can list entries of some external databases, and allows users to match them against Wikidata items
    - OpenRefine is a powerful free, open source tool for working with messy data
    - Wikidata reconciliation for OpenRefine
    - Wikibase is an open-source software suite
  - App::Wikidata::Print - Base class for Wikidata command line tool wd-print
  - CGI::Kwiki - A Quickie Wiki that's not too Tricky
  - CGI::Wiki::Kwiki - An instant wiki built on CGI::Wiki
  - Kwiki::Archive::Cvs - Kwiki Page Archival Using CVS - Deprecated
  - Kwiki-Kwiki - Kwiki Kwiki is a Wiki
  - Text::MediawikiFormat - Translate Wiki markup into other text formats
  - Text::WikiFormat - Module for translating Wiki formatted text into other formats
  - Toolforge::MixNMatch::Object - Toolforge Mix'n'match tool objects
  - Wiki::JSON - Parse wiki-like articles to a data-structure transformable to JSON
  - Wiki::Toolkit - A toolkit for building Wikis
  - Wiki::Toolkit::Formatter::Default - A formatter for Wiki::Toolkit
  - Wiki::Toolkit::Formatter::Mediawiki - A Mediawiki-style formatter for Wiki::Toolkit
  - Wiki::Toolkit::Formatter::XHTMLMediaWiki - A Mediawiki-style formatter for Wiki::Toolkit
  - Wiki::Toolkit::Store::Database - Parent class for database storage backends for Wiki::Toolkit
  - Wiki::Toolkit::Store::Mediawiki - Mediawiki (MySQL) storage backend for Wiki::Toolkit
  - Wikibase::Cache::Backend::Basic - Wikibase cache backend to local static basic ids (units, common properties)
  - Wikibase::Datatype - Wikibase datatypes
  - Wikibase::Datatype::Print - Wikibase datatype print helpers
  - Wikibase::Datatype::Query - Query class on Wikibase item
  - Wikibase::Datatype::Struct - Wikibase structure serialization via JSON to MediaWiki
- Win32Stuff
  - ⊕ See also
    - [Topic]
  - Alien::wxWidgets - Building, finding and using wxWidgets binaries
  - Win32 - Interfaces to some Win32 API Functions
  - Win32::EventLog - Process Win32 Event Logs
  - Win32::Mechanize::NotepadPlusPlus - Automate the Windows application Notepad++
  - Win32::NetAdmin - Manage network groups and users
  - Win32::Process - Create and manipulate processes
  - Win32API::Console - Win32 native Console API
  - Win32API::File::Time - Set file times, even on open or readonly files
- WindowManagement
  - ⊕ See also
    - [Topic]
    - Win32Stuff - For Wx
    - [Topic]
  - App::Codit - IDE for and in Perl
  - pEFL - Perl binding to the Enlightenment Foundation Libraries
  - ⊕ Notes for pEFL
    - https://www.enlightenment.org/start
  - Termbox::PP - Minimalistic terminal UI library in pure Perl
  - Tk - A graphical user interface toolkit for Perl
  - Tk::AppWindow - An application framework based on Tk
  - Tk::ColorEntry - Entry widget with a color selection facilities
  - Tk::DocumentTree - ITree based document list
  - Tk::Entry - Create and manipulate Entry widgets
  - Tk::FBox - A file dialog
  - Tk::FileBrowser - Advanced file system explorer
  - Tk::FileManager - Tk::FileBrowser based filemanager
  - Tk::getOpenFile - Pop up a dialog box for the user to select a file to open.
  - Tk::HList - Create and manipulate Tix Hierarchial List widgets
  - Tk::IconList - An icon list widget
  - Tk::Listbox - Create and manipulate Listbox widgets
  - Tk::ListBrowser - Tk::IconList inspired chameleon list box
  - Tk::ListEntry - BrowseEntry like widget without button
  - Tk::Poplevel - Popping a toplevel without decoration relative to a widget
  - Tk::PopList - Popping a selection list relative to a widget
  - Tk::Toplevel - Create and manipulate Toplevel widgets
  - Wx - Interface to the wxWidgets cross-platform GUI toolkit
  - ⊕ Notes for Wx
    - A wrapper for the wxWidgets (formerly known as wxWindows) GUI toolkit
  - Wx::Perl::IconDepot - Use icon libraries quick & easy
  - Wx::Perl::Packager - PAR assistant for packaging Wx applications on MSWin and Linux
- XDGBaseDirectorySpecification
  - ⊕ See also
    - XDG Base Directory Specification
  - File::XDG - Basic implementation of the XDG base directory specification
- XML
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - http://savage.net.au/misc/Mojo.Wiki.html
  - Alien::pugixml - Find or build pugixml C++ XML parser library
  - XML::Bare - Minimal XML parser implemented via a C state engine
  - XML::Chain - A chained way of manipulating and inspecting XML documents
  - XML::Descent - Recursive descent XML parsing
  - XML::DOM - A perl module for building DOM Level 1 compliant document structures
  - XML::Easy - XML processing with a clean interface
  - XML::Easy::NodeBasics - Basic manipulation of XML data nodes
  - XML::Easy::ProceduralWriter - Even easier writing of XML
  - XML::Easy::SimpleSchemaUtil - Help with simple kinds of XML schema
  - XML::Enc - A toolkit to help encrypt and decrypt XML Digital Signatures
  - XML::Entities - Decode strings with XML entities
  - XML::Fast - Simple and very fast XML - hash conversion
  - XML::Feed - Syndication feed parser and auto-discovery
  - XML::GDOME - Interface to Level 2 DOM gdome2 library
  - XML::Grove::Builder - PerlSAX handler for building an XML::Grove
  - XML::Handler::Trees - PerlSAX handlers for building tree structures
  - XML::Hash::XS - Simple and fast hash to XML and XML to hash conversion written in C
  - XML::IETF - An interface to the IETF XML Registry.
  - XML::LibXML - Perl Binding for libxml2
  - ⊕ Notes for XML::LibXML
    - http://grantm.github.io/perl-libxml-by-example/
    - Supports parsing huge documents
    - Supports parsing (possibly faulty) HTML
  - XML::LibXSLT - Interface to the GNOME libxslt library
  - XML::Loy - Extensible XML Reader and Writer
  - XML::MyXML - A simple-to-use XML module, for parsing and creating XML documents
  - XML::Parser - A perl module for parsing XML documents
  - ⊕ Notes for XML::Parser
    - Includes XML::Parser::Expat
  - XML::Parser::EasyTree - Easier tree style for XML::Parser
  - XML::PP - A simple XML parser
  - ⊕ Notes for XML::PP
    - Prefer XML::Simple or XML::LibXML
  - XML::PugiXML - Perl binding for pugixml C++ XML parser
  - XML::Sablotron - A Perl interface to the Sablotron XSLT processor
  - XML::SAX::Simple - XML::SAX::Simple - SAX version of XML::Simple
  - XML::Saxon::XSLT2 - Process XSLT 2.0 using Saxon 9.x
  - ⊕ Notes for XML::Saxon::XSLT2
    - http://saxon.sourceforge.net/
  - XML::Sig - A toolkit to help sign and verify XML Digital Signatures
  - XML::Sig::OO - Modern XML Signatured validation
  - XML::Similarity - Calculate the structural similarity between two XML documents
  - XML::Simple - An API for simple XML files - Deprecated
  - XML::Smart - A smart, easy and powerful way to access or create XML from fiels, data and URLs
  - XML::TokeParser - Simplified interface to XML::Parser
  - XML::TreeBuilder - Parser that builds a tree of XML::Element objects
  - ⊕ Notes for XML::TreeBuilder
    - Contains XML::Element
  - XML::TreePP - Pure Perl implementation for parsing/writing XML documents
  - XML::Trivial - The trivial tool representing parsed XML as tree of read only objects
  - XML::Twig - A Perl module for processing huge XML documents in tree mode
  - XML::XPath::XMLParser - The default XML parsing class that produces a node tree
- XS
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
    - [Topic]
  - ExtUtils::XSpp - XS for C++
  - List::Util::MaybeXS - List::Util but with Pure Perl fallback
  - List::Util::XS - Indicate if List::Util was compiled with a C compiler
  - ⊕ Notes for List::Util::XS
    - Included in Scalar::List::Utils
  - Missing::XS - Print warnings about XS modules you should probably install
  - ⊕ Notes for Missing::XS
    - Meaning you are using the pure Perl version but an XS version exists
- XsbLanguage
  - ⊕ See also
    - [Topic]
    - [Topic]
  - Language::XSB - Use XSB from Perl
- XWindowsStuff
  - ⊕ See also
  - App::DesktopNotifyUtils - Utilities related to Desktop::Notify
  - App::XWindowManagerUtils - Utilities related to X Window Manager
  - AnyEvent::I3 - Communicate with the i3 window manager
  - AnyEvent::I3X::Workspace::OnDemand - An I3 workspace loader
  - Config::XrmDatabase - Pure Perl X Resource Manager Database
  - Net::DBus - Perl extension for the DBus message system
  - ⊕ Notes for Net::DBus
    - Used by Desktop::Notify above
  - X11::korgwm - A tiling window manager written in Perl
  - X11::XCB - Perl bindings for libxcb
- YamlStuff
  - ⊕ See also
    - [Topic]
    - [Topic]
    - [Topic]
    - https://www.cloudbees.com/blog/yaml-tutorial-everything-you-need-get-started
    - https://yaml.org/
  - Alien::YAMLScript - Find or install libys
  - Config::LNPath - A Simple YAML Config Reader.
  - Text::FrontMatter::YAML - Read the 'YAML front matter' format
  - YAML - YAML Ain't Markup Languageâ¢
  - YAML::As::Parsed - Read/Write YAML predictably
  - YAML::LibYAML - Perl YAML Serialization using XS and libyaml
  - YAML::LibYAML::API - Wrapper around the C libyaml library
  - YAML::PP - YAML 1.2 processor
  - YAML::PP::LibYAML - Faster parsing for YAML::PP
  - YAML::Safe - Safe Perl YAML Serialization using XS and libyaml
  - YAML::Syck - Fast, lightweight YAML loader and dumper
  - ⊕ Notes for YAML::Syck
    - See also JSON::Syck
  - YAML::Tiny - Read/Write YAML files with as little code as possible
  - YAML::XS - Perl YAML Serialization using XS and libyaml
  - ⊕ Notes for YAML::XS
    - But see YAML::Safe
  - YAML::Syck - Fast, lightweight YAML loader and dumper - Deprecated
  - ⊕ Notes for YAML::Syck
    - Use JSON::XS instead
  - YAMLScript - Program in YAML â Code is Data
  - YAMLStar - Pure YAML 1.2 loader via FFI
  - Yote::Spiderpup - Compile YAML recipes into reactive JavaScript and HTML
  - ⊕ Notes for Yote::Spiderpup
    - See also Yote::SQLObjectStore
- ZMQ
  - ⊕ See also
    - [Topic]
  - ZMQ - Perl-ish Interface libzmq
  - ZMQ::FFI - Version agnostic Perl bindings for zeromq using ffi
  - ZMQ::LibZMQ3 - A libzmq 3.x wrapper for Perl
- ZuzuLanguage
  - ⊕ See also
    - For ZuzuScript
    - https://zuzulang.org/guide/for-programmers/perl
  - Zuzu - API helpers for evaluating ZuzuScript