Tiki Groupware/CMS : Tiki Wiki CMS Groupware is a free and open source Wiki-based content management system and online office suite written primarily in PHP and distribute...
Plone : Plone is a free and open source content management system built on top of the Zope application server.
SPIP : SPIP est un système de publication pour l’Internet qui s’attache particulièrement au fonctionnement collectif, au multilinguisme et à la facilité d’em...
iPlotz : Wireframing, mockups and prototyping for websites and applications
WikkaWiki : WikkaWiki is a flexible, standards-compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages.
free ware open source CMS software with XML Sapiens, file flat, WYSIWYG, RSS and web services development tool (for news publishing, gallery, survey, ecommerce and etc)