WowBB offers features such as auto install/upgrade, a WYSIWYG editor with integrated spell-checker, auto time zone detection and smart caching. Requires PHP and MySQL.

Unicode-supporting PHP/MySQL forum software that produces standard XHTML and CSS. [Open source, GPL]

A PHP/MySQL port of Yet another Bulletin Board (YaBB) 1 Gold.

A PHP/MySQL bulletin board package designed for small to medium sized web sites. [Open source, GPL]

PHP forum system with MySQL, PostgreSQL or SQLite backend that supports USENET and email list archiving.

Presents features, and requirements of the free bulletin board application with demo, downloads, manual and community forum. Premium extensions and service also available.

Open-source forum software in PHP.

Forum software integrated with the Joomla content management system [Freeware].

A PHP/MySQL implementation of DCForum web discussion program. [Commercial]

A portal extension for the Simple Machines Forum that adds website oriented features. Includes pages, blocks and modules.