WiKi Tools

•      PBWiki: hosted by pbwiki.com, no need to install.

•      Mediawiki: open source software package originally written for Wikipedia.

   Requirements: PHP, MySQL (PostgreSQL), Web Server

   Installation manual: http://meta.wikimedia.org/wiki/Help:Installation

•      A comparison of Wiki Software: http://en.wikipedia.org/wiki/Comparison_of_wiki_software