The Free / Libre / Open Source Web App with the most built-in features
The open-source digital workplace for growing teams and enterprises.
WackoWiki is a light and easy to install multilingual Wiki-engine.
Converts PMWiki to Markdown
Wiki generator and Java Help System
The Free & Popular MediaWiki Web Software in Complete Virtual Machine
Open Source Enterprise Wiki and Web Application Platform
stro is an open-source cross-platform MMORPG server.
Embeddable/J2E/Desktop Java Wiki CMS
Piggydb helps you have more fun with knowledge creation.
A free, open-source, offline Wikipedia application
Cavendish-MW is a MediaWiki skin based on Mozilla's Cavendish skin
Editor of references for Wikipedia's editors
Simplest wiki+tracker system
The Halo extension extends MediaWiki and Semantic Mediawiki