YaWiki.com

YaWiki is 'Yet Another Wiki for PHP'.

YaWiki, , and located at YaWiki.com, can be used as a traditional wiki; it adheres to much of the Wiki Way.

Because YaWiki is designed for collaborative web-based  efforts, YaWiki adds logical name spaces, s (ACLs), navigational elements, and more. You may enable any, all, or none of these extra features.