Mediawiki vs Tiki Wiki
MediaWiki is a popular free web-based wiki software application. Developed by the Wikimedia Foundation, it is used to run all of its projects, including Wikipedia, Wiktionary and Wikinews. It is written in the PHP programming language and uses a backend database.
Tiki is the Free/Libre/Open Source Web Application with the most built-in features. So whatever feature you can imagine running in your browser window, chances are Tiki does it. Knowledge base: Wiki, FAQs, File gallery, Photo Album, Tags, Search, Kaltura video management integration, etc. Collaboration/Project Management: Wiki, Forums, Tasks, Permissions, Timeline, Proposals/Votes, Blog, Categories, Watch, etc. Publishing/web site: News articles, Blog, RSS, Newsletter, Maps, Themes, Banners, WYSIWYG, SEO, etc.