The Digest::CRC module calculates CRC sums of all sorts. It contains wrapper functions with the correct parameters for CRC-CCITT, CRC-16 and CRC-32.

This module implements a Singleton class from which other classes can be derived. By itself, the Class::Singleton module does very little other than manage the instantiation of a single object.

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

This package enables you to do generic message logging throughout programs and projects. Every message will be logged with stacktraces, timestamps and so on. You can use built-in handlers immediately, or after the fact when you inspect the error stack. It is highly configurable and lets you even provide your own handlers for dealing with messages.

This module first checks to see if either Cpanel::JSON::XS or JSON::XS is already loaded, in which case it uses that module. Otherwise it tries to load Cpanel::JSON::XS, then JSON::XS, then JSON::PP in order, and either uses the first module it finds or throws an error.

This package provides a set of numeric types to be used in Moo-based classes, adapted from MooseX::Types::Common::Numeric.

This package provides Digest::SHA3, an implementation of the NIST SHA-3 message digest algorithm for use by Perl programs.

Term::ANSIColor provides constants and simple functions for setting ANSI text attributes, most notably colors. It can be used to set the current text attributes or to apply a set of attributes to a string and reset the current text attributes at the end of that string. Eight-color, sixteen-color, 256-color, and true color (24-bit color) escape sequences are all supported.

Role::Tiny is a minimalist role composition tool.

lib::relative module proposes a more straightforward method than adding a path to @INC: take a path relative to the current file, absolutize it, and add it to @INC.

Crypt::CBC is a Perl-only implementation of the cryptographic Cipher Block Chaining (CBC) mode. In combination with a block cipher such as Crypt::Rijndael you can encrypt and decrypt messages of arbitrarily long length. The encrypted messages are compatible with the encryption format used by SSLeay.

Strictures turns on strict and make all warnings fatal when run from within a source-controlled directory.

This module provides a flexible calling interface to some frequently-performed string conversion functions, including applying and expanding standard C/Unix-style backslash escapes like and , wrapping and removing double-quotes, and truncating to fit within a desired length.

File::Find::Object is an object-oriented File::Find replacement in Perl.

This package provides a selection of regular expression subroutines including is_regexp, regexp_seen_evals, regexp_is_foreign, regexp_is_anchored, serialize_regexp, and deserialize_regexp.

Text::Aligner exports a single function, align(), which is used to justify strings to various alignment styles.

This module provides a Perl interface to the iconv() codeset conversion function, as defined by the Single UNIX Specification. For more details see the POD documentation embedded in the file Iconv.pm, which will also be installed as Text::Iconv(3) man page.

Module::Find lets you find and use modules in categories. This can be useful for auto-detecting driver or plugin modules. You can differentiate between looking in the category itself or in all subcategories.

This module handles parsing, modifying and creating configuration files of the style used by the Git version control system.

This module runs code after a subroutine call, preserving the context the subroutine would have seen if it were the last statement in the caller.

Perl::MinimumVersion takes Perl source code and calculates the minimum version of perl required to be able to run it. Because it is based on the PPI (Perl Parsing Interface), it can do this without loading the code. The distribution comes with a script called perlver.

Encode module provides the interface between Perl strings and the rest of the system. Perl strings are sequences of characters.

This module implements an interface to the GNU Readline library. It gives you input line editing facilities, input history management facilities, completion facilities, etc. Term::ReadLine::Gnu is upwards compatible with Term::ReadLine.

This module allows you to read and write an OLE-Structured file. OLE (Object Linking and Embedding) is a technology to store hierarchical information such as links to other documents within a single file.