eZ Publish – Open Source Enterprise Content Management System
http://ez.no/ezpublish

Ready-to-run Enterprise Content Management solution. Provides out-of-the-box functionality useful in most scenarios. eZ Publish is an Open Source Enterprise Content Management System and framework. There are many extensions available written by third parties, also distributed under an Open Source license. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.