This module exports a single hash (%RE) that stores or generates commonly needed regular expressions. Patterns currently provided include: balanced parentheses and brackets, delimited text (with escapes), integers and floating-point numbers in any base (up to 36), comments in 44 languages, offensive language, lists of any pattern, IPv4 addresses, URIs, and Zip codes.

DateTime is a class for the representation of date/time combinations. It represents the Gregorian calendar, extended backwards in time before its creation (in 1582).

This package transparently speeds up functions by caching return values, trading space for time.

Assigns a new name to referenced sub. If package specification is omitted in the name, then the current package is used. The return value is the sub.

File::Find::Rule is a friendlier interface to File::Find. It allows you to build rules which specify the desired files and directories.

Loading MooX::StrictConstructor makes your constructors "strict". If your constructor is called with an attribute init argument that your class does not declare, then it dies.

This Spreadsheet::ParseExcel module parses Microsoft Excel95, 97 and 2000 format files.

IO::CaptureOutput provides routines for capturing STDOUT and STDERR from perl subroutines, forked system calls (e.g. system(), fork()) and from XS or C modules.

This module is no longer recommended by its maintainer. Users are advised to try Capture::Tiny instead.

This is Graph, a Perl module for dealing with graphs, the abstract data structures.

Module::ScanDeps is a module to recursively scan Perl programs for dependencies.

This package contains a selection of subroutines that people have expressed would be nice to have in the perl core, but the usage would not really be high enough to warrant the use of a keyword, and the size so small such that being individual extensions would be wasteful.

A shared memory cache through an mmap'ed file. It's core is written in C for performance. It uses fcntl locking to ensure multiple processes can safely access the cache at the same time. It uses a basic LRU algorithm to keep the most used entries in the cache.

This module implements a subset of the YAML specification for use in reading and writing CPAN metadata files like META.yml and MYMETA.yml.

This package provides procedures to get and set resource limits like getrlimit and setpriority.

Routines to manipulate defhash, a convention to define things more precisely and uniformly using a hash, in Perl.

The Inline module allows you to put source code from other programming languages directly (inline) in a Perl script or module. The code is automatically compiled as needed, and then loaded for immediate access from Perl.

Sys::SigAction is a Perl extension for Consistent Signal Handling.

The IPC::Run3 module allows you to run a subprocess and redirect stdin, stdout, and/or stderr to files and perl data structures. It aims to satisfy 99% of the need for using system, qx, and open3 with a simple, extremely Perlish API and none of the bloat and rarely used features of IPC::Run.

This module provides a clone() method which makes recursive copies of nested hash, array, scalar and reference types, including tied variables and objects.

The Digest::SHA Perl module implements the hash functions of the SHA family. It also provides the shasum binary.

This module in a fully object-oriented implementation of a simple n-ary tree.

This module allows you to wrap OP check callbacks.

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.

Data::OptList provides a simple syntax for name/value option pairs.