Bitweaver

Bitweaver is an open source content management system. It's speed and power are ideal for large scale community websites and corporate applications, but it is simple enough for non-technical small site users to set up and administrate. It comes fully featured on install but is easy to extend.

Out of the box Bitweaver comes with a full set of features you want in a CMS, such as: Articles, Wiki Pages, Blogs, Categories, Image Galleries, Calendar, User Management, Choice of Database, Languages, Theming, Comments, etc,

http://www.bitweaver.org