AI::Categorizer
   A framework for automatic text categorization
   http://search.cpan.org/~kwilliams/AI-Categorizer-0.07/

Apache/Perl Module List
   A list of Perl modules used for interacting with the Apache Webserver.
   http://perl.apache.org/products/apache-modules.html

Apache::ASP
   A Perl module that provides an Active Server Pages (ASP) port to the Apache Webserver. It allows developers to create dynamic web applications with session management and embed Perl code directly in static HTML files.
   http://www.apache-asp.org/

Apache::Cookie
   Interface to the cookie routines in libapreq. Based on CGI::Cookie.
   http://httpd.apache.org/apreq/Apache-Cookie.html

Apache::Htaccess
   Allows creation and modification of Apache .htaccess files.
   http://sourceforge.net/projects/apache-htaccess/

App::Modular and other Perl Modules
   Modules for developing modular applications, template parser, configuration file handling, and daemons.
   http://technik.juz-kirchheim.de/projects/Perl-Modules.html

Authen::PAM
   A Perl module which provides an interface to the PAM library.
   http://nik.pelov.name/Authen-PAM/

Backend News Project
   A group of Perl modules that can be used to extract backend news files from different web sites and display the news in a personal website that has the ability to run Perl CGI scripts. Project is still in beta phase.
   http://backendnews.sourceforge.net/

Browse and Search CPAN - Randy Kobes
   Documentation on CPAN modules along with links to file name, module name, and category resources.
   http://cpan.uwinnipeg.ca/htdocs/faqs/cpan-search.html

CDDB / CDDB_Get
   Retrieves the CDDB information for an audio CD.
   http://armin.emx.at/cddb/

CFITSIO
   Offers an interface to William Pence's CFITSIO subroutine library.
   http://hea-www.harvard.edu/~rpete/cfitsio/

CGI.pm
   A popular module for CGI programming; read forms, use cookies, and generate HTML. Included in the standard distribution of Perl 5.
   http://search.cpan.org/dist/CGI.pm/

CGI::Cache
   Perl extension to help cache output of time-intensive CGI scripts so that subsequent visits to such scripts will not cost as much time.
   http://cgicache.sourceforge.net/

CORBA::ORBit
   Perl binding for ORBit.
   http://people.redhat.com/otaylor/corba/orbit.html

CPAN >> Perl Core Modules >> Module
   A guide to creating new Perl modules and locating existing ones.
   http://cpan.uwinnipeg.ca/chapter/Perl_Core_Modules/Module

CPAN Code Search by Gonzui
   Searches within the source code of all the modules available on CPAN.
   http://cpansearch.bulknews.net/

CPAN Leaderboard
   A list of CPAN authors, sorted in descending order by number of distributions contributed. Source code available.
   http://thegestalt.org/simon/perl/wholecpan.html

CPAN++
   Provides command-line access to the CPAN interface.
   http://cpanplus.dwim.org

Cache::Cache
   Designed to assist a developer in persisting data for a specified period of time.
   http://perl-cache.sourceforge.net/

Class::Date
   Provides a date datatype for Perl. With mailing list.
   http://hacks.dlux.hu/Class-Date/

Config::
   Facilitates cached and pre-parsed file reading.
   http://www.fatalmind.com/software/CONFIG/

Config::General
   Generic Perl module for reading and writing complex configuration files. Listed on CPAN.
   http://www.daemon.de/ConfigGeneral

Devel::Profiler
   Profiler compatible with dprofpp.
   http://sourceforge.net/projects/devel-profiler/

Embperl
   A server-side tool and framework for building websites with embedding Perl code in HTML pages. [Open source, GPL or Artistic License]
   http://perl.apache.org/embperl/

Finance::Quote
   Can be used to obtain information from a variety of sources, including markets in Australia, USA, Canada, Europe, and a number of managed funds.
   http://finance-quote.sourceforge.net/

Finance::QuoteHist
   Several modules designed to fetch historical stock quotes from the web. Includes interfaces for Yahoo, WallStreetCity, and SiliconInvestor.
   http://www.mojotoad.com/sisk/projects/Finance-QuoteHist/

Finance::StockTrade
   Library of modules (and example scripts) for performing various on-line stock trading tasks such as buying, selling, and monitoring.
   http://jeremy.zawodny.com/perl/Finance-StockTrade/

GPS
   Provides access to several GPS protocols, such as Garmin, NMEA, and Magellan.
   http://sourceforge.net/projects/perl-gps/

Geo::METAR
   Designed for accessing aviation weather information.
   http://jeremy.zawodny.com/perl/Geo-METAR/

Glade-Perl
   Perl generator for Glade.
   http://www.glade-perl.connectfree.co.uk/

IMDB.pm
   Allows the retrieval of information about DVDs and media from the Internet Movie Database.
   http://www.infocopter.com/perl_corner/retos-imdb.htm

Installing Perl Modules
   A guide to installing Perl modules on Unix and Windows platforms.
   http://www.rcbowen.com/imho/perl/modules.html

Java
   Module allows talk to a JVM on a local or remote machine.
   http://search.cpan.org/~metzzo/Java-4.7/Java.pm

LEGO::RCX
   Allows one to communicate with the Lego MindStorms(R) RCX brick from a workstation through the IR tower.
   http://search.cpan.org/~jquillan/LEGO-RCX-1.01/RCX.pm

Lingua::Romana::Perligata
   Damian Conway's paper on the module that makes it possible to write Perl programs in Latin.
   http://www.csse.monash.edu.au/~damian/papers/HTML/Perligata.html

MARC
   A Perl module for reading, manipulating, outputting and converting bibliographic records in the Machine Readable Cataloging (MARC) format.
   http://marcpm.sourceforge.net/

MP3::Album
   Perl extension to manage a music album built of mp3 files.
   http://search.cpan.org/~bmavt/MP3-Album-0.14/Album.pod

Module::Reloadable
   Used to reload specific modules in a permanent-running environment.
   http://hacks.dlux.hu/Module-Reloadable/

Net::DNS
   Collection of modules that act as a Domain Name System resolver. They allows the programmer to perform DNS queries that are beyond the capabilities of gethostbyname and gethostbyaddr.
   http://www.net-dns.org/

Net::ICQ2000
   Module for handling the ICQ2000 protocol.
   http://sourceforge.net/projects/neticq2k/

Net::Whois::RIPE
   Object-orientated module that provides methods to query, retrieve and update RIPE-157 formated objects, from whois servers that support this format.
   http://sourceforge.net/projects/net-whois-ripe/

Net::Z3950
   This module provides a Perl interface to the Z39.50 information retrieval protocol.
   http://www.miketaylor.org.uk/tech/nz/

Net::Z3950::SimpleServer
   Implements the server side of the Z39.50 (information retrieval) protocol.
   http://www.indexdata.dk/simpleserver/

NetCDFPerl
   A Perl extension module for scientific data access via version 2 of the netCDF API.
   http://www.unidata.ucar.edu/software/netcdf-perl/

Parallel::ForkManager
   Object-orientated parallel processing fork manager.
   http://hacks.dlux.hu/Parallel-ForkManager/

PerLDAP
   A Perl module that allows programmers to access and manipulate LDAP directories.
   http://www.perldap.org/

Perl Beans
   Implementation of the Java Beans framework in Perl.
   http://sourceforge.net/projects/perlbeans/

Perldoc.com: Core Modules
   Documentation for modules that form part of the standard distribution of perl.
   http://perldoc.perl.org/index-modules-A.html

Persistent
   A framework of classes that provides persistence for Perl objects.
   http://www.bigsnow.org/persistent/

RDFStore
   API for RDF storage and maintenance.
   http://rdfstore.sourceforge.net/

SMIME
   A Perl module for making smime signatures as well as basic key generation and certificate authority functions.
   http://www.symlabs.com/Offerings/Net_SSLeay/smime.html

Skybound Software.
   The home of SMS::Ringtone::RTTTL::Parser (a RTTTL string parser and validator) and SMS::Ringtone::RTTTL::MIDI (a RTTTL to MIDI format converter). A free web service is also available to test these modules.
   http://www.skybound.nl/products/perl/

Spreadsheet::WriteExcel
   Information and examples for creating Excel Spreadsheet files with Perl.
   http://homepage.eircom.net/~jmcnamara/perl/WriteExcel.html

TableMap
   Maps relational tables into hashes.
   http://hacks.dlux.hu/TableMap/

Test::Cmd
   Provides a low-level framework for portable automated testing of executable commands and scripts.
   http://www.baldmt.com/Test-Cmd/

The Bioperl Project
   A collection of Perl modules for developers of bioinformatics software.
   http://www.bioperl.org/

The Perl DateTime Project
   A set of modules for dealing with today's complex time zone system, date conversion and calculating the date upon which Easter falls in a given year.
   http://datetime.perl.org/

The WebFetch Project
   A set of Perl5 modules that provide a framework for retrieving information from local files and/or the web.
   http://www.webfetch.org/

VACM::Perl
   Wrappers for the VACM programmer's API.
   http://vacm-perl.sourceforge.net/

WWW::SMS
   Framework for sending free SMSs over the web.
   http://www-sms.sourceforge.net/

WWW::Search
   A collection of Perl modules which provide an API to WWW search engines like AltaVista, Lycos, Hotbot, and WebCrawler.
   http://www.isi.edu/lsam/tools/WWW_SEARCH/

WebL-Perl
   Allows access of WebL scripts from Perl.
   http://www.vandenbrande.com/projects/WebL/

WebService::weblogUpdates
   Implements methods supported by UserLand weblogUpdates framework.
   http://search.cpan.org/~ascope/WebService-weblogUpdates-0.35/lib/WebService/weblogUpdates.pm

WebTools
   Package to aid Web developers. Supports embedding Perl in HTML files, flat file databases, session tracking and cookies, and MySQL/MS Access.
   http://www.proscriptum.com/

Win32::MSAgent
   Allows to use the Microsoft Agent 2.0 OLE control in perl scripts.
   http://search.cpan.org/~jouke/Win32-MSAgent-0.07/lib/Win32/MSAgent.pm

WordNet Perl Module
   An object oriented interface to WordNet 1.6 database.
   http://people.csail.mit.edu/jrennie/WordNet/

Writing Apache modules with Perl and C
   Home site of the book about creating Web server modules using the Apache API.
   http://modperl.com/

Writing Perl Modules for CPAN
   Publisher's site for the book by Sam Tregar. The entire first chapter, 'CPAN', is available for free in PDF format.
   http://apress.com/book/bookDisplay.html?bID=14

X11::Fvwm
   A Perl module for interfacing with the FVWM2 X11 window manager API.
   http://www.byz.org/~randy/perl/X11::Fvwm/

cgi-lib.pl
   Very popular Perl 4/5 module for simple CGI tasks, such as reading form input.
   http://cgi-lib.berkeley.edu/

dTemplate
   General-purpose, lightweight, templating system.
   http://hacks.dlux.hu/dTemplate/

fmscore and Mail::Freshmeat
   A Perl program and module which it use supplied by the user of freshmeat.net newsletter to rank the entries in a newsletter by interest. It also has the nice side effect of removing the advertising from the top of the newsletter.
   http://adamspiers.org/computing/fmscore/

libwww-perl
   Modules to provide a simple and consistent programming interface to the WWW.
   http://lwp.linpro.no/lwp/

p5-IPA
   Library of image processing algorithms. Based on the Prima toolkit.
   http://www.prima.eu.org/IPA/

wxPerl
   Perl bindings to the wxWindows cross-platform toolkit.
   http://wxperl.sourceforge.net/