Simple Machines Forum

Simple Machines Forum — SMF in short — is a free, professional grade software package that allows you to set up your own online community within minutes.

Free Open Source Mac OS X Windows Linux Self-Hosted

FluxBB

FluxBB is a fast, light, user-friendly forum application for your website. FluxBB was designed as a lighter, faster alternative to some of the traditional feature heavy forum applications.

Free Open Source Mac OS X Windows Linux Web

PunBB

PunBB is a fast and lightweight PHP-powered discussion board. It is released under the GNU General Public License.

Free Open Source Mac OS X Windows Linux

PHP Forum Script

PHP Forum Script by PHPJabbers is the perfect online forum software for all kinds of websites! It contains all must-have features of a modern, user-friendly forum...

Commercial Windows Linux

Kunena

Kunena is the ideal forum extension for Joomla. It's free, fully integrated, and no bridges or hacks are required. Want to know more about the Kunena Project? See...

Free Self-Hosted Joomla

miniBB

miniBB is a standalone, open source program for building your own Internet forum. If you want a lite, simple and stable message board attached to your existing website...

Free Open Source Self-Hosted