Executable comments like the ANSI C library assert.h

https://metacpan.org/release/Carp-Assert

Convenience wrappers around Carp::Assert

https://metacpan.org/release/Carp-Assert-More

Report errors from perspective of caller of a "clan" of modules

http://search.cpan.org/dist/Carp-Clan/

Analyze raw flow files written by cflowd (Cisco NetFlow data)

http://net.doit.wisc.edu/~plonka/Cflow/

Perl5 interface to build chart graphics

http://search.cpan.org/dist/Chart/

Parse and generate Cisco configuration files

http://search.cpan.org/dist/Cisco-Reconfig/

Automated accessor generation

http://search.cpan.org/dist/Class-Accessor/

Make chained accessors

http://search.cpan.org/dist/Class-Accessor-Chained/

Lets you build groups of accessors

http://search.cpan.org/dist/Class-Accessor-Grouped/

Minimalistic variant of p5-Class-Accessor

http://search.cpan.org/dist/Class-Accessor-Lite/

Perl implementation of the "Adapter" Design Pattern

http://search.cpan.org/dist/Class-Adapter/

Useful base class for deriving other modules

http://search.cpan.org/dist/Class-Base/

A pragma to use the C3 method resolution order algorithm

http://search.cpan.org/dist/Class-C3/

Load mix-ins or components to your C3-based class

http://search.cpan.org/dist/Class-C3-Componentised/

XS speedups for Class::C3

http://search.cpan.org/dist/Class-C3-XS/

Glues object frameworks together transparently

Simple Database Abstraction

http://search.cpan.org/dist/Class-DBI/

Abstract Class::DBI SQL with SQL::Abstract

http://search.cpan.org/dist/Class-DBI-AbstractSearch/

Abstract base class for Class::DBI plugins

http://search.cpan.org/dist/Class-DBI-Plugin/

Get COUNT(*) results with abstract SQL

http://search.cpan.org/dist/Class-DBI-Plugin-AbstractCount/

Provides deep_search_where() for Class::DBI

https://metacpan.org/release/Class-DBI-Plugin-DeepAbstractSearch

Perl extension to paged queries for CDBI

http://search.cpan.org/dist/Class-DBI-Plugin-Pager/

Inheritable, overridable class data

http://search.cpan.org/dist/Class-Data-Inheritable/

Utility functions for (factory) classes

http://search.cpan.org/dist/Class-Factory-Util/

Perl extension for class dispatcher that handles namespaces like paths

https://metacpan.org/release/AWNCORP/Class-Forward-0.100006

Class and object builder

http://search.cpan.org/dist/Class-Gomor/

Report the search path for a class's ISA tree

https://metacpan.org/release/Class-ISA

Perlish implementation of Java like inner classes

https://metacpan.org/release/Class-Inner

Safe, simple inside-out object construction kit

https://metacpan.org/release/Class-InsideOut

Provides information about classes

http://search.cpan.org/dist/Class-Inspector/

Working (require Class::Name) and more

https://metacpan.org/pod/Class::Load

XS implementation of parts of Class::Load

https://metacpan.org/release/Class-Load-XS

Generate common types of methods

http://search.cpan.org/dist/Class-MakeMethods/

Provides Moose-like method modifiers

http://search.cpan.org/dist/Class-Method-Modifiers/

Perl module for creating generic methods

https://metacpan.org/release/Class-MethodMaker

Perl module for dynamic class mixing

https://metacpan.org/release/Class-Mix

Perl module that describes a singular object class

http://search.cpan.org/dist/Class-Singleton/

Perl extension for minimalist class construction

https://metacpan.org/release/Class-Tiny

Mixin to add / call inheritable triggers

http://search.cpan.org/dist/Class-Trigger/

Generate fast XS accessors without runtime compilation

http://search.cpan.org/dist/Class-XSAccessor/

Clone - recursively copy Perl datatypes

http://search.cpan.org/dist/Clone/

Choose appropriate clone utility

https://metacpan.org/release/Clone-Choose

Recursively copy Perl datatypes

https://metacpan.org/release/Clone-PP

Utilities for commandline-based programs

https://metacpan.org/release/Commandable

Low-Level Interface to bzip2 compression library

http://search.cpan.org/dist/Compress-Raw-Bzip2/

Low-Level Interface to lzma compression library

https://metacpan.org/release/Compress-Raw-Lzma

Low-Level Interface to zlib compression library

http://search.cpan.org/dist/Compress-Raw-Zlib/

Load class configuration data from a number of file formats

https://metacpan.org/release/Config-Any

Magical config file parser

https://metacpan.org/release/Config-Auto

Perl module to implement some of AutoConf macros

https://metacpan.org/release/Config-AutoConf