phpBB
Open Source
phpBB is an Internet forum package in the PHP language.
Simple Machines Forum
Open Source
Simple Machines Forum software, or SMF software, is an open source, Internet forum, message-board.
IP.Board
Commercial
IPS Community Suite (Invision Power Suite) is an Internet community software.
MyBB
Open Source
MyBulletinBoard is a free and open source forum software.
FluxBB
Open Source
PunBB (PunBulletinBoard) is a lightweight PHP-based internet discussion board system. It is released under the GNU General Public License. The projects primar…
XenForo
Commercial
XenForo is an Internet forum software package written in the PHP using the Zend Framework.
Compare vBulletin with alternatives
Compare Simple Machines Forum and vBulletin and decide which is most suitable for you.