Switch is a Perl module which implements a generalized case mechanism. The module augments the standard Perl syntax with two new statements: switch and case.

This module is a simple visitor implementation for Perl values. It has a main dispatcher method, visit, which takes a single perl value and then calls the methods appropriate for that value. It can recursively map (cloning as necessary) or just traverse most structures, with support for per-object behavior, circular structures, visiting tied structures, and all ref types (hashes, arrays, scalars, code, globs).

This module allows code attributes of methods to be introspected using Moose meta method objects.

This package provides a simple Perl library to extract height/width from images.

DateTimeX::Easy uses a variety of DateTime::Format packages to create DateTime objects, with some custom tweaks to smooth out the rough edges (mainly concerning timezone detection and selection).

The Digest::JHash module allows you to use the fast JHash hashing algorithm developed by Bob Jenkins from within Perl programs. The algorithm takes as input a message of arbitrary length and produces as output a 32-bit "message digest" of the input in the form of an unsigned long integer.

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.

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 module provides a function-based interface to dynamic loading as used by Perl. Some details of dynamic loading are very platform-dependent, so correct use of these functions requires the programmer to be mindfulof the space of platform variations.

This library allows communication with a smart card using PC/SC from a Perl script.

Number::Range is an object-oriented interface to test if a number exists in a given range, and to be able to manipulate the range.

Sub::Exporter provides a sophisticated alternative to Exporter.pm for custom-built routines.

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.

Devel::CheckCompiler is a tiny module to check whether a compiler is available. It can test for a C99 compiler, or you can tell it to compile a C source file with optional linker flags.

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

String::Format lets you define arbitrary printf-like format sequences to be expanded. This module would be most useful in configuration files and reporting tools, where the results of a query need to be formatted in a particular way. It was inspired by mutt's .

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).

Config::AutoConf is intended to provide the same opportunities to Perl developers as GNU Autoconf does for Shell developers.

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.

This module allows errors from a clan (or family) of modules to appear to originate from the caller of the clan. This is necessary in cases where the clan modules are not classes derived from each other, and thus the Carp.pm module doesn't help.

PPI::XS provides (minor) XS acceleration for PPI.

This module applies roles to make a subclass instead of manually setting up a subclass.

This module provides a list of known mime-types, combined from various sources. For instance, it contains all IANA types and the knowledge of Apache.

This is a Perl package designed to generate browsable HTML documentation from the POD (Plain Old Documentation) embedded in Perl source code.