Community Forums

vBulletin  *favorite*
Scalable and fully customisable forums package for your web site. Uses PHP and MySQL.
http://www.vbulletin.com   (review rate bookmark)

Build A Community
Suite of cgi programs which can work together to create a dynamic and multi-purposed portal site.
http://www.buildacommunity.com   (review rate bookmark)

phpBB
Scalable open source free bulletin board package. Written in PHP and supports a variety of backend database solutions.
http://www.phpbb.com/   (review rate bookmark)

Snitz Forums
Free ASP based bulletin board system with large support community.
http://www.snitz.net   (review rate bookmark)

UBB Developer's Network
Resources and discussions about the the modification of Infopop's UBB forum software.
http://www.ubbdev.com   (review rate bookmark)

Ultimate Bulletin Board
Add community participation to your website. Discussion forums, message boards, and other community tools.
http://www.infopop.com   (review rate bookmark)

vBulletin Templates
Excellent source of complete templates, template modifications, and graphics for the vBulletin forums system.
http://www.vbulletintemplates.com   (review rate bookmark)

vBulletin.org
Official site for enhancements, hacks, template changes, and code tweaks of the vBulletin forum software.
http://www.vbulletin.org/   (review rate bookmark)