This module provides a collection of test utilities for directory attributes.

Testing code can involve making sure that files are created and deleted as expected. Doing this manually can be error prone, as it's easy to forget a file, or miss that some unexpected file was added. This module simplifies maintaining test directories by tracking their status as they are modified or tested with this API, making it simple to test both individual files, as well as to verify that there are no missing or unknown files.

Test::Version checks to ensure that all modules have a version defined, and that the version is valid.

Test::Deep compares two structures by going through each level, ensuring that the values match, that arrays and hashes have the same elements and that references are blessed into the correct class. It also handles circular data structures without getting caught in an infinite loop.

Test::Output provides a simple interface for testing output sent to STDOUT or STDERR. A number of different utilities are included to try and be as flexible as possible to the tester.

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

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.

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

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

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

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.

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.

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

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

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

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 module provides functions to percent-encode and percent-decode URI strings as defined by RFC 3986. Percent-encoding URI's is informally called URI escaping. This is the terminology used by this module, which predates the formalization of the terms by the RFC by several years.

Back in the early days of the web, many people learned Perl because of a wonderful Perl library called CGI. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new endeavor to implement this idea using modern technologies.

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

This module is a suite of tools for implementing DMARC. It adheres to the 2013 DMARC draft, intending to implement every MUST and every SHOULD.