Allows your classes to do coercion of parameters (Params::Coerce)

https://metacpan.org/release/Params-Coerce

Utility functions to aid in parameter checking

https://metacpan.org/release/Params-Util

Validate method/function parameters

https://metacpan.org/release/Params-Validate

Build an optimized subroutine parameter validator once, use it forever

https://metacpan.org/release/Params-ValidationCompiler

Parse META.yml and other similar CPAN metadata files

http://search.cpan.org/dist/Parse-CPAN-Meta/

Parse a distribution name

https://metacpan.org/dist/Parse-Distname

Parser for the IRC protocol

https://metacpan.org/release/Parse-IRC

Perl6 like method signature parser

https://metacpan.org/release/Parse-Method-Signatures

Recursive descent parsing framework for Perl

https://metacpan.org/release/Parse-RecDescent

Perl5 routines that present a simple interface to parse syslog files

https://metacpan.org/release/Parse-Syslog

Perl extension for generating and using LALR parsers

https://metacpan.org/release/Parse-Yapp

Perl module with utilities to read and manipulate patches and CVS

http://search.cpan.org/dist/PatchReader/

Cross-platform path specification manipulation

https://metacpan.org/release/Path-Class

File path utility

https://metacpan.org/release/Path-Tiny

Perl module for portably manipulating file specifications

https://metacpan.org/release/PathTools

Acmeist PEG Parser Framework

https://metacpan.org/release/Pegex

Critique Perl source for style and standards

https://metacpan.org/release/Perl-Critic

Find a minimum required version of perl for Perl code

https://metacpan.org/release/Perl-MinimumVersion

Map Perl operating system names to generic types

https://metacpan.org/release/Perl-OSType

Tool to scan your Perl code for its prerequisites

https://metacpan.org/release/Perl-PrereqScanner-NotQuiteLite

Indents and reformats Perl scripts to make them easier to read

https://metacpan.org/release/Perl-Tidy

Fast and correct UTF-8 IO

https://metacpan.org/release/PerlIO-utf8_strict

Interface for using perl5 to access PostgreSQL databases

https://www.postgresql.org/

Perl extension of PSGI reference implementation and utilities

https://metacpan.org/release/Plack

Checks if the documentation of a module is comprehensive

https://metacpan.org/release/Pod-Coverage

Declare trusted symbol names in POD

https://metacpan.org/release/Pod-Coverage-TrustPod

For resolving Pod E<...> sequences

https://metacpan.org/release/Pod-Escapes

Read a POD document as a series of trivial events

https://metacpan.org/release/Pod-Eventual

Module to convert POD to Markdown

https://metacpan.org/release/Pod-Markdown

POD Object Model

https://metacpan.org/release/Pod-POM

Modules to work with POD (Plain Old Documentation)

https://metacpan.org/release/Pod-Parser

Convert POD to README file

https://metacpan.org/release/Pod-Readme

Framework for parsing Pod

https://metacpan.org/release/Pod-Simple

Formatter for spellchecking Pod

https://metacpan.org/release/Pod-Spell

Remove POD from Perl code

https://metacpan.org/release/Pod-Strip

Extracts embedded tests and code examples from POD

https://metacpan.org/release/Pod-Tests

Information about the currently running perl

https://metacpan.org/release/Probe-Perl

Limit the number of child processes running

https://metacpan.org/release/Proc-Queue

Interpret and act on wait() status values

https://metacpan.org/release/Proc-WaitStat

Perl module that provides access to filesystem quotas

https://metacpan.org/release/Quota

XML-RPC client and server library for Perl

https://metacpan.org/release/RPC-XML

Perl 5 module for Term::ReadLine editing without GNU readline

http://search.cpan.org/dist/Term-ReadLine-Perl/

Facility for creating read-only scalars, arrays, hashes

https://metacpan.org/release/Readonly

Utility functions for checking references

https://metacpan.org/release/Ref-Util

Utility functions for checking references (XS version)

https://metacpan.org/release/Ref-Util-XS

Regexp::Common - Provide commonly requested regular expressions

https://metacpan.org/release/Regexp-Common

Builds trie-ized regexp

https://metacpan.org/release/Regexp-Trie

Return::Value - Polymorphic Return Values

https://metacpan.org/release/Return-Value

Roles, like a nouvelle cusine portion size slice of Moose

https://metacpan.org/release/Role-Tiny

Simple HTTP Router

https://metacpan.org/release/Router-Simple