This Digest::Perl::MD5 has the same interface as the much faster Digest::MD5, but it's a pure Perl implementation of MD5. Because of this it is slow but it works without C code.

This module provide a convenient way to create directories of arbitrary depth and to delete an entire directory subtree from the file system.

Many Perl distributions use a Build.PL file instead of a Makefile.PL file to drive distribution configuration, build, test and installation. Traditionally, Build.PL uses Module::Build as the underlying build system. This module provides a simple, lightweight, drop-in replacement. Whereas Module::Build has over 6,700 lines of code; this module has less than 120, yet supports the features needed by most distributions.

Text::TabularDisplay simplifies displaying textual data in a table. The output is identical to the columnar display of query results in the mysql text monitor.

This module provides a small, fast utility for working with file paths.

Devel::Caller provides meatier version of caller.

This module understands the formats used by PostgreSQL for its DATE, TIME, TIMESTAMP, and INTERVAL data types. It can be used to parse these formats in order to create DateTime or DateTime::Duration objects, and it can take a DateTime or DateTime::Duration object and produce a string representing it in a format accepted by PostgreSQL.

Moo is an extremely light-weight Object Orientation system. It allows one to concisely define objects and roles with a convenient syntax that avoids the details of Perl's object system. Moo contains a subset of Moose and is optimised for rapid startup.

The DateTime::Locale modules provide localization data for the DateTime.pm class.

The Cache modules are designed to assist a developer in persisting data for a specified period of time. Often these modules are used in web applications to store data locally to save repeated and redundant expensive calls to remote machines or databases. People have also been known to use Cache::Cache for its straightforward interface in sharing data between runs of an application or invocations of a CGI-style script or simply as an easy to use abstraction of the file system or shared memory.

DateTime::Format::Natural takes a string with a human readable date/time and creates a machine readable one by applying natural parsing logic.

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

This package provides some basic statistics on numerical vectors. All the subroutines can take a reference to the vector to be operated on.

Hook::LexWrap allows you to install a pre- or post-wrapper (or both) around an existing subroutine. Unlike other modules that provide this capacity (e.g., Hook::PreAndPost and Hook::WrapSub), Hook::LexWrap implements wrappers in such a way that the standard caller function works correctly within the wrapped subroutine.

This module lets you require other modules where the module name is in a variable, something you can't do with the require built-in.

PerlIO::utf8_strict provides a fast and correct UTF-8 PerlIO layer. Unlike Perl's default :utf8 layer it checks the input for correctness.

The Eval::WithLexicals Perl library provides support for lexical scope evaluation. This package also includes the tinyrepl command, which can be used as a minimal Perl read-eval-print loop (REPL).

This module intends to be a better Text::Wrap module. This module is needed to support multibyte character encodings such as UTF-8, EUC-JP, EUC-KR, GB2312, and Big5. This module also supports characters with irregular widths, such as combining characters (which occupy zero columns on terminal, like diacritical marks in UTF-8) and fullwidth characters (which occupy two columns on terminal, like most of east Asian characters). Also, minimal handling of languages which doesn't use whitespaces between words (like Chinese and Japanese) is supported.

This module provides a facility for creating non-modifiable variables in Perl. This is useful for configuration files, headers, etc. It can also be useful as a development and debugging tool for catching updates to variables that should not be changed.

Storable brings persistence to your Perl data structures containing SCALAR, ARRAY, HASH or REF objects, i.e. anything that can be conveniently stored to disk and retrieved at a later time.

This package provides Digest::SHA1, an implementation of the NIST SHA-1 message digest algorithm for use by Perl programs.

This module attempts to emulate the behavior of Class::Accessor::Fast as accurately as possible using the Moose attribute system. The public API of Class::Accessor::Fast is wholly supported, but the private methods are not.

This package provides basic statistics functions like median(), mean(), variance() and stddev().

Given a list of scalars or reference variables, Data::Dumper writes out their contents in Perl syntax. The references can also be objects. The content of each variable is output in a single Perl statement. It handles self-referential structures correctly.