Sub::Install makes it easy to install subroutines into packages without the unsightly mess of C<no strict> or typeglobs lying about where just anyone can see them.

DateTime::Format::Builder creates DateTime parsers. Many string formats of dates and times are simple and just require a basic regular expression to extract the relevant information. Builder provides a simple way to do this without writing reams of structural code.

IO::String is an IO::File (and IO::Handle) compatible class that reads or writes data from in-core strings.

This module is about the native integer numerical data type. A native integer is one of the types of datum that can appear in the numeric part of a Perl scalar. This module supplies constants describing the native integer type. Both signed and unsigned representations are handled.

The package provides a number of useful typemaps as submodules of ExtUtils::Typemaps.

This package compiles yacc-like Look Ahead LR (LALR) grammars to generate Perl object oriented parser modules.

The PPI module parses, analyzes and manipulates Perl code.

File::Find::Object is an object-oriented File::Find replacement in Perl.

MIME-tools is a collection of Perl5 MIME:: modules for parsing, decoding, and generating single- or multipart (even nested multipart) MIME messages.

This module allows you to speed up your sleep(), alarm(), and time() calls.

Soundex is a phonetic algorithm for indexing names by sound, as pronounced in English. The goal is for names with the same pronunciation to be encoded to the same representation so that they can be matched despite minor differences in spelling.

This module implements the original soundex algorithm developed by Robert Russell and Margaret Odell, patented in 1918 and 1922, as well as a variation called "American Soundex" used for US census data, and current maintained by the National Archives and Records Administration (NARA).

The form() subroutine may be exported from the module. It takes a series of format (or "picture") strings followed by replacement values, interpolates those values into each picture string, and returns the result. The effect is similar to the inbuilt perl format mechanism, although the field specification syntax is simpler and some of the formatting behaviour is more sophisticated.

The Digest::HMAC module follows the common Digest:: interface for the RFC 2104 HMAC mechanism.

This module abstracts out the process of choosing one of several underlying implementations for a module. This can be used to provide XS and pure Perl implementations of a module, or it could be used to load an implementation for a given OS or any other case of needing to provide multiple implementations.

Exporter implements an import method which allows a module to export functions and variables to its users' namespaces. Many modules use Exporter rather than implementing their own import method because Exporter provides a highly flexible interface, with an implementation optimised for the common case.

This module makes the functionality of the perltidy command available to Perl scripts. Any or all of the input parameters may be omitted, in which case the @ARGV array will be used to provide input parameters as described in the perltidy(1) man page.

The Digest::MD5 module allows you to use the MD5 Message Digest algorithm from within Perl programs. The algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input.

This module converts Perl data structures to MessagePack and vice versa. MessagePack is a binary-based efficient object serialization format. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small.

JSON::Parse is a module for parsing JSON. It offers parse_json which takes a string containing JSON and returns an equivalent Perl structure, valid_json which returns true or false depending on whether the JSON is correct or not, assert_valid_json which produces a descriptive fatal error if the JSON is invalid, and so on.

A String::Util module of small, handy functions for processing strings in various ways.

This package provides a simplified frontend to Log::Message, offering most common use for logging, and easy access to the stack (in both raw and pretty-printable form).

This package lets you declare types using short names, but behind the scenes it namespaces all your type declarations, effectively prevent name clashes between packages.

This is "Not Quite Perl" -- a lightweight Raku-like environment for virtual machines. The key feature of NQP is that it's designed to be a very small environment (as compared with, say, Rakudo) and is focused on being a high-level way to create compilers and libraries for virtual machines like MoarVM, the JVM, and others.

Unlike a full-fledged implementation of Raku, NQP strives to have as small a runtime footprint as it can, while still providing a Raku object model and regular expression engine for the virtual machine.

Zef is a Raku package (module) manager. It can be used to download and install Raku modules in your home directory or as a system-wide module.