mwForum - Open-source, uses Perl/MySQL, compatible with mod_perl for optimal performance. Design goals: ease of use, stability, security, speed, professional and consistent look, easy customization. - http://www.mwforum.org/
CuteCast - Free web-based discussion forum application, written in Perl. Runs on UNIX or NT. Screen shots, list of features. - http://www.cutecast.org/
Boardawy - Forum software and bulletin board system, multi lingual, multi theme, SQL driven, highly customisable, the ideal community solution for web site. [Open source] - http://www.boardawy.com
BBmatic BBS - Perl bulletin board script allows users to post comments and followups, with long text in new window. Manager removes posts by age or number. [Freeware] - http://www.getcruising.com/crypt/bbmat.html
DCForum - A Web discussion software written in Perl. [Commercial] - http://www.dcscripts.com/dcforum.shtml
Vag BBS - Message forum script for UNIX, written in Perl. [Open source, GPL] - http://akgames.com:8080/#app
Ruboard - A Web board written in Perl, is similar to Matt Wright's WWWBoard, but completely rewritten to improve stability, configurability and ease of use. [Open source, GPL] - http://amsoft.ru/ruboard/
XMLBoard - A message board script, written in Perl. Allows multiple forums. Built-in search. [Open source, GPL] - http://sourceforge.net/projects/xmlboard/
bbBoard - a Perl discussion software which enables users to interact amongst each other. [Commercial] - http://www.bbv2.com/
RPGBoard - Calls itself the Swiss army knife of message board scripts. Written in Perl, is free, under the GPL. Features list, comparison chart, links to sites using the script. - http://www.resonatorsoft.org/rpgboard/
SimpleForum - A simple CGI script to maintain and run Bulletin Board Systems. Runs on any server with Perl installed. - http://simpleforum.net/
Slash - The Perl/MySQL code used to run Slashdot. - http://slashdot.org/code.shtml
TalkShop - Collection of Perl scripts to run a web forum. Started in life as Matt Wright's WWWBoard, but has several added features including search, subscription, moderation. - http://www.spiceisle.com/talkshop/faq.htm
Teemz Discussion Systems - Free Perl/CGI message board system. Lightweight, customisable through the use of skins. - http://www.teemz.com/
UBB Central - Ultimate Bulletin Board. A web-based bulletin board system written in the Perl language backed by a flat-file database with a unique caching system. - http://www.ubbcentral.com/
UBB Developers Network - A community of CGI-Perl programmers and web developers centered around modifying the Ultimate Bulletin Board software. - http://www.ubbdev.com/
WebBBS - Perl-based WWWboard-like format. Shareware. Site includes downloads, FAQs, links to sites using this forum. - http://awsd.com/scripts/webbbs/
WWWBoard - Offers a free, threaded message board programmed in Perl. - http://www.scriptarchive.com/wwwboard.html
X-Forum - Free bulletin board program written in Perl. English and Dutch language modules. System requirements, screen shot, list of features. - http://www.codingdomain.com/
YaBB - Open source, customizable forum software written in Perl. Runs on Unix or Windows NT. - http://www.yabbforum.com/
HyperNews - Web-based threaded discussion board software written in Perl. Package of CGI programs provide centralized, asynchronous conferencing capabilities for HTTP servers. Open source, runs on UNIX. - http://www.hypernews.org/HyperNews/get/hypernews.html