aterr
bbPress
BurningBoard
Community Server
Lista di script per forum oltre a un sito che permette di fare ricerche incrociate per mettere a confronto i vari sistemi open source ..
DeluxeBB
dnfBB
E-Blah
Elite Bulletin Board
FusionBB
IceBB
idealBB
Invision Power Board
JForum
Jive Forums
MercuryBoard
MetaForum
miniBB
Monkey Boards
MyBB
MyProBB
NextBBS
PapyrusBB
Phorum
phpBB
punBB
Quicksilver Forums
SamePage
SMF
UBB.threads
Unclassified NewsBoard
UseBB
Vanilla
vBulletin
Vikingboard
Viscacha
Web Crossing Community
WowBB
Yazd
YetAnotherForum
http://www.forummatrix.org/