TikiWiki is a powerful open-source Content Management System (CMS) and Groupware that can be used to create all sorts of Web applications, sites, portals, intranets, and extranets. Major features include articles, forums, newsletters, blogs, a file/image gallery, a Wiki, drawing, trackers, a directory, polls/surveys and quizzes, a FAQ, chat, a banner management system, Webmail, a calendar, Ephemerides, maps, charts, Mobile Tiki (PDA and WAP access), RSS feeds, a category system, a theme control center, workflow, live support, Shoutbox, ACLs, and more.

TikiWiki is available in about 35 languages including Chinese, Czech, Danish, Dutch, English, French, German, Italian, Japanese, Portuguese, Slovak, Spanish, Swedish, Arabic, ... Tikiwiki is Free Software powered by PHP, ADOdb and Smarty released as an Open Source under LGPL. You can find an extensive documentation with all the necessary information to download, install and use the CMS. An excellent CMS solution that you should give it a try to see its performance.