OmegaBB incorporates AJAX thinking into forum software, making a real-time message board unlike all others. It features tabbed forums for quick and easy navigation, notification on a side panel when any of your watched threads change, public and private threads, a wiki article system, and more.
Tiki Wiki CMS Groupware is a full-featured, Web-based, multilingual, tightly integrated, all-in-one wiki, CMS, and groupware. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge bases, intranets, and extranets. Tiki offers a very large number of features "out-of-the-box". It is highly configurable and modular. All features are optional and administered via a Web-based interface. Major features include a robust wiki engine, news articles, discussion forums, newsletters, blogs, file and image galleries, bug and issue trackers, a link directory, polls/surveys and quizzes, FAQs, a banner management system, calendar, maps, mobile access, RSS feeds, a category system, tags, an advanced themeing engine (Smarty), spreadsheet, live support, shoutbox, inter-user messaging, menu generator, advanced permission system for users and groups, internal search engine, external authentication support, and more. It was formerly named TikiWiki.
sfMaraePlugin is a threaded forum plugin for symfony. Current features include fully threaded categories and posts; a customizable permissions system for groups and individual users, allowing fine-grained settings for starting new topics, replying, editing, deleting, and viewing whole categories; and the ability to vote individual comments up and down.