Open source Web forums

Flarum

Flarum is free, open-source forum software with a focus on simplicity. You can use Flarum to easily set up a discussion forum for your website. (MIT)

Cross-platform

FluxBB

FluxBB is designed as a lighter, faster alternative to some of the traditional feature heavy forum applications. It is easy to use and has a proven track record of stability and security making it an ideal choice of forum for your website. (GPL)

Cross-platform

MyBB

MyBB is the free and open source, intuitive, extensible, and incredibly powerful forum software you've been looking for. Through plugins and themes, you can extend MyBB's functionality to build your community exactly as you'd like it. (GPL)

Cross-platform

phpBB

Millions of people use phpBB on a daily basis, making it the most widely used opensource bulletin board system in the world. (GPL)

Cross-platform

Vanilla

Vanilla provides hosted and open source community forum software that powers discussion forums on thousands sites. Built for flexibility and integration, Vanilla is the best, most powerful community solution in the world. (GPL)

Cross-platform

YAF.NET

The YAF.NET (YetAnotherForum.NET) project is an international collaboration of like-minded, skilled, and creative individuals who are striving to make YAF.NET the most robust and malleable forum solutions available. (Apache)

Windows

6 applications