__DIR__ constant for the directory your source file is in

Treat a directory and a manifest file as a hash/dictionary of keys to texts or blobs

Calculate and verify Subresource Integrity hashes (SRI)

Perl interface to the SHA-1 algorithm

Perl Implementation of Rivest's MD5 algorithm

Perl extension for getting MD5 sums for files and urls

Perl interface to the MD4 Algorithm

Perl extension for 32 bit Jenkins Hashing Algorithm

Keyed-Hashing for Message Authentication

Module that calculates CRC sums of all sorts

Linux/POSIX emulation of Win32::SerialPort functions

Print out each line before it is executed (like sh -x)

Dump symbol names or the symbol table

Displays stack trace in HTML

Object representing a stack trace

Perl extension for finding the memory usage of Perl variables

Obtain the REFCNT value of a referent

Patch perl source a la Devel::PPPort's buildperl.pl

Partial dumping of data structures, optimized for argument printing

Perl/Pollution/Portability

Override CORE::GLOBAL::require safely

Introspect overloaded operators

Powerful fast feature-rich Perl source code profiler

Utility for looking for perl objects that are not reclaimed

Forces the unavailability of specified Perl modules (for testing)

Detect perl's global phase on older perls

Provides function returning the equivalent of ${^GLOBAL_PHASE} eq 'DESTRUCT' for older perls

Find the path to your perl

Framework for managing deprecations

Create deprecation schedules in your code

(DEPRECATED) Adding keywords to perl, in perl

Find memory cycles in objects

Code coverage metrics for Perl

Check that a library is available

Check what OS we're running on

Check the compiler's availability

Check that a command is available

Perl side of the Perl debugger for IntelliJ IDEA and other JetBrains IDEs

Meatier versions of caller

Deliantra support module to read/write archetypes, maps etc

Collection of handy debugging routines for displaying the values of variables with a minimum of coding

Parse a date/time string using the best method available

Time zone object base class and factory

DateTime set objects

Localization support for DateTime.pm

Create DateTime objects with sub-second current time resolution

Parse and format W3CDTF datetime strings

Parse and format strp and strf time patterns

Parse and format SQLite dates and times

Parse and format RFC3339 datetime strings

Parse and format PostgreSQL dates and times

Parse informal natural language date/time strings

Parse and format MySQL dates and times

Convert between DateTime and RFC2822/822 formats

Parses ISO8601 formats

Parse and format iCal datetime and duration strings

Date conversion routines

Flexibly parse strings and turn them into DateTime objects

Parses Date::Parse compatible formats

Create DateTime parser classes and objects

DateTime::Set extension for create basic recurrence sets

DateTime rfc2445 recurrences

DateTime object in the Julian calendar

Date and time object for Perl

Simple date object

Work with a range of dates

Date manipulation routines

Extract probable dates from strings

Gregorian calendar date calculations

Visitor style traversal of Perl data structures

Common URL validation methods

IPv4 and IPv6 validation methods

Domain and host name validation

Selection of utilities for data and data types

Perl extension for simple generating of unique id's

Fast random UUID generator using the Mersenne Twister algorithm

Globally/Universally Unique Identifiers (GUIDs/UUIDs)

Allow complex data structures to be encoded using flat URIs

Taint-aware, XML-ish data serialization

Change nature of data within a structure

N at a time iteration API

Structured Tags

Page numbering and spread pagination

Modules that serialize data structures

Read data from __DATA__

Read multiple hunks of data out of your DATA section

Parse Lisp S-Expressions into perl data structures

Perl module to generate random data

Colored & full-featured pretty print of Perl data structures and objects

Base classes wrapping fundamental Perl data types

Perl extension for assessing password quality

Change long page list to be shorter and well navigate

Help when paging through sets of results

Parse and validate simple name/value option pairs