From quine's wiki

Main: CMS

Joomla

Joomla! MindMap Converter
Free Joomla Templates provided by RocketTheme
SMF Forum

Task Managers for Joomla

Project Fork
Task Hopper
Task Hopper Installation

Group Permissions for Joomla!

JUGA
RokAccess

FireBoard Plugins

FireBoard SearchBot

MindTouch Deki Wiki

http://wiki.mindtouch.com/Deki_Wiki a wiki that can do mash-ups