Apache Lenya is an Open Source Java/XML Content Management System and comes with revision control, multi-site management, scheduling, search, WYSIWYG editors, and workflow.
qooxdoo is a universal JavaScript framework with a coherent set of individual components and a powerful toolchain. It is open source under liberal licenses and supported by the qooxdoo community around the world.
DAS is the Dynamic content Administration System for the websites. It is designed for the content management of DB, i.e. to browse, add, edit and delete data.
PostNuke is software that creates an impressive, dynamic web site and provides the webmaster with a site they can administer with a minimal amount of HTML knowledge through a web browser.