This package provides functions to work with directory and file names.

File::Find is great, but constructing the wanted routine can sometimes be a pain. File::Finder provides a wanted-writer, using syntax that is directly mappable to the find(1) command's syntax.

A File::Finder object contains a hash of File::Find options, and a series of steps that mimic find's predicates. Initially, a File::Finder object has no steps. Each step method clones the previous object's options and steps, and then adds the new step, returning the new object. In this manner, an object can be grown, step by step, by chaining method calls. Furthermore, a partial sequence can be created and held, and used as the head of many different sequences.

This module reads a file backwards line by line. It is simple to use, memory efficient and fast. It supports both an object and a tied handle interface.

It is intended for processing log and other similar text files which typically have their newest entries appended to them. By default files are assumed to be plain text and have a line ending appropriate to the OS. But you can set the input record separator string on a per file basis.

List::Compare provides a module to perform comparative operations on two or more lists. Provided operations include intersections, unions, unique elements, complements and many more.

This package provides procedures to create read-only scalars, arrays, and hashes.

Date::Calc::XS is an XS wrapper and C library plug-in for Date::Calc.

Module::Manifest is a simple utility module created originally for use in Module::Inspector.

It can load a MANIFEST file that comes in a Perl distribution tarball, examine the contents, and perform some simple tasks. It can also load the MANIFEST.SKIP file and check that.

Devel::Cycle This is a tool for finding circular references in objects and other types of references. Because of Perl's reference-count based memory management, circular references will cause memory leaks.

This Perl modules implements Future::Queue, a class providing a simple FIFO queue that stores arbitrary Perl values. Values may be added into the queue using the push method, and retrieved from it using the shift method.

This module provides some XS functions to assist in writing parsers for sub-like syntax, primarily for authors of keyword plugins using the PL_keyword_plugin hook mechanism.

This module implements the Rijndael cipher which has been selected as the Advanced Encryption Standard. The keysize for Rijndael is 32 bytes. The blocksize is 16 bytes (128 bits). The supported encryption modes are:

• MODE_CBC---Cipher Block Chaining

• MODE_CFB---Cipher feedback

• MODE_CTR---Counter mode

• MODE_ECB---Electronic cookbook mode

• MODE_OFB---Output feedback

This module provides lexicon-handling modules to read from other localization formats, such as Gettext, Msgcat, and so on.

Spiffy is a framework and methodology for doing object oriented (OO) programming in Perl. Spiffy combines the best parts of Exporter.pm, base.pm, mixin.pm and SUPER.pm into one magic foundation class. It attempts to fix all the nits and warts of traditional Perl OO, in a clean, straightforward and (perhaps someday) standard way. Spiffy borrows ideas from other OO languages like Python, Ruby, Java and Perl 6.

Magic is Perl's way of enhancing variables. This mechanism lets the user add extra data to any variable and hook syntactical operations (such as access, assignment or destruction) that can be applied to it. With this module, you can add your own magic to any variable without having to write a single line of XS.

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

This package provides the Statistics::PCA module, an implementation of Principal Component Analysis (PCA).

Filesys::Notify::Simple is a simple but unified interface to get notifications of changes to a given file system path. It uses inotify2 on Linux, fsevents on OS X, kqueue on FreeBSD, and FindFirstChangeNotification on Windows if they're installed, and falls back to a full directory scan if none of these are available.

Object::Signature is an abstract base class that you can inherit from in order to allow your objects to generate unique cryptographic signatures.

This module provides tools to deal with International Standard Book Numbers, including ISBN-10 and ISBN-13.

Exporter::Lite is an alternative to Exporter, intended to provide a lightweight subset of the most commonly-used functionality. It supports import(), @EXPORT and @EXPORT_OK and not a whole lot else.

Capture::Tiny provides a simple, portable way to capture almost anything sent to STDOUT or STDERR, regardless of whether it comes from Perl, from XS code or from an external program. Optionally, output can be teed so that it is captured while being passed through to the original file handles.

Text::BibTeX is a Perl library for reading, parsing, and processing BibTeX files. Text::BibTeX gives you access to the data at many different levels: you may work with BibTeX entries as simple field to string mappings, or get at the original form of the data as a list of simple values (strings, macros, or numbers) pasted together.

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 package provides a Perl module for TrueType/OpenType font hacking. It supports reading, processing and writing of the following tables: GDEF, GPOS, GSUB, LTSH, OS/2, PCLT, bsln, cmap, cvt, fdsc, feat, fpgm, glyf, hdmx, head, hhea, hmtx, kern, loca, maxp, mort, name, post, prep, prop, vhea, vmtx and the reading and writing of all other table types.