Forums

Phorum is a web based message board written in PHP. Phorum is designed with high-availability and visitor ease of use in mind. Features such as mailing list integration, easy customization, and simple installation make Phorum a powerful add-in to any website.

phpBB is a free flat-forum bulletin board software solution that can be used to stay in touch with a group of people or can power your entire website.

PunBB is a fast and lightweight PHP-powered discussion board.

W-Agora is a web publishing and forum software. It allows you and your visitors to store and display messages, files, share discussions and other information on your website.

Elegant. Effective. Powerful. Free. SMF is all of the above. SMF is a next-generation community software package and is jam-packed with features, while at the same time having a minimal impact on resources.

The Unclassified NewsBoard (short UNB) is an open-source, PHP-based internet bulletin board system, mostly like those you may already know. But the difference is in a lot of details that make your life with this board, both as administrator and user, much easier.

UseBB is a free and effective PHP/MySQL bulletin board package.

miniBB® is a standalone, open source program for building your own Internet forum, it's free to download and highly customizable.

MyBB is the free and open source, intuitive, extensible, and incredibly powerful forum software you've been looking for.

Simple and flexible forum software. Great for enthusiasts and small businesses.