Test::Class provides a simple way of creating classes and objects to test your code in an xUnit style.

Built using Test::Builder, it was designed to work with other Test::Builder based modules (Test::More, Test::Differences, Test::Exception, etc.).

This module provides the most commonly used testing functions, along with automatically turning on strict and warning and gives a bit more fine-grained control over test suites.

Test::File::Contents provides functions for testing the contents of files.

Using Test::PerlTidy, any file ending in .pl, .pm, .t or .PL will cause a test fail unless it is exactly as perltidy would like it to be.

This test module helps write unit tests which assert that the code under test reports metrics via Metrics::Any.

The Compress::Raw::Zlib module provides a Perl interface to the zlib compression library.

The Compress::Bzip2 module provides a Perl interface to the Bzip2 compression library. A relevant subset of the functionality provided by Bzip2 is available in this module.

Perl's IO::Compress module provides an interface for reading and writing compressed data created with the zlib and bzip2 libraries.

PerlIO::gzip provides a PerlIO layer that manipulates files in the format used by the gzip program.

This module Compress::Raw::Bzip2 provides a Perl interface to the bzip2 compression library.

The IO::Zlib module is a Perl IO style interface to Compress:Zlib that simplifies reading and writing compressed data.

It allows you to extract any archive file of the type .tar, .tar.gz, .gz, .Z, tar.bz2, .tbz, .bz2, .zip, .xz,, .txz, .tar.xz or .lzma without having to worry how it does so, or use different interfaces for each type by using either Perl modules, or command-line tools on your system.

The Archive::Zip module allows a Perl program to create, manipulate, read, and write Zip archive files.

This package provides PGPLOT bindings for Perl. It uses giza instead of PGPLOT for the implementation, though.

This packages allows you to interpolate the value Y from X using a list of (X, Y) pairs.

This package provides the Math::MatrixReal module. It implements the data type "matrix of real numbers" (and consequently also "vector of real numbers").

This package provides modules to do 3D graphics in PDL.

The Math::Cephes module provides a Perl interface to over 150 functions of the Cephes math library.

This package provides a library and simple REPL for the Perl Data Language.

This package provides a library and simple REPL for the Perl Data Language.

This package provides a HTML and XML DOM parser. It also supports CSS selectors.

The Perl module Geo::IP looks up location and network information by IP Address.

This module implements a wrapper for Net::SMTP, enabling over-SSL/STARTTLS support. This module inherits most of all the methods from Net::SMTP(2.X).

WWW::Pastebin::PastebinCom::Create provides functionality to paste on Pastebin without API keys.