coWiki web collaboration tool
DokuWiki
ErfurtWiki
LabWiki
Minki
Particle Wiki
Publicist ? A free collaborative web magazine tool for schools, clubs etc
PWP Wiki Processor
Sinapse Lite
SiteWiki
SpeedyWiki 2.1
Text_Wiki
Tiki
WebLime
Wikepage! wikisite/blog/personal site creator
Wikiwig : the first Wysiwyg Wiki
WikkaWiki
WikyBlog
Yawiki