SAPID : free ware open source CMS software with XML Sapiens, file flat, WYSIWYG, RSS and web services development tool (for news publishing, gallery, survey, ...
Outline : Team wiki, documentation, meeting notes, playbooks, onboarding, work logs, brainstorming, & more…
PhpWiki : PhpWiki is a clone of the original WikiWikiWeb
DokuWiki : DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Tiki Wiki CMS Groupware is a free and open source Wiki-based content management system and online office suite written primarily in PHP and distributed under the GNU Lesser General Public License (LGPL) license.