Invision Power Board 1.1.2 + 1.2 beta 2 (ipb)
http://www.invisionboard.com/
Yet Another Bulletin Board 1.3.1 (YaB
http://www.yabbforum.com/
phpBB 2.0.4 (phpB
http://www.phpbb.com/
OpenBB 1.0.5
http://www.openbb.com/
Ikonboard 3.1.1 + 3.1.2a
http://www.ikonboard.com/
Phorum 3.4.3a + 5.0.1-alpha
http://phorum.org/
W-Agora 4.1.5 + dev-14-april
http://www.w-agora.com/
XMB Forum 1.8
http://www.xmbforum.com/
Snitz Forums 2000 3.4.03
http://forum.snitz.com/
Web Wiz Forums 7.01
http://www.webwizguide.info/web_wiz_forums/
RPG Board
http://www.resonatorsoft.org/software/rpgboard/
WwwBoard 2.0 Alpha 2
http://www.scriptarchive.com/wwwboard.html
Versatile Bulletin Board
http://vbb.eniki.de/
KForum 1.4.2d
http://www.kotfs.com/
tForum
http://www.tforum.org/
SX:Forums
http://www.shopstix.net
ASP.NET Forums (by Microsoft)
http://www.asp.net/Forums/