Mediawiki

MediaWiki is the collaborative editing software that runs Wikipedia, the free encyclopedia, and other projects.

Developer: Wikipedia
license License: GNU General Public License (GPL)
operating systems Operating System: Linux

WikyBlog is a Wiki ~ Blog (Bliki) CMS/Groupware application written in PHP/MySQL.

Developer: Josh Schmidt - Maintainer
license License: GNU General Public License (GPL)
operating systems Operating System: ALL