Open Source Java/XML Content Management System – Apache Lenya
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.
You can move, copy, rename, archive or delete individual pages or whole parts of your site with an easy to use site view that shows you the pages of your site in an explorer-like view.
The navigation framework automatically creates navigation items such as menus, breadcrumb paths and tabs. It produces clean accessible URLs that helps with search engines.
Website: http://lenya.apache.org/