OpenCMS by Alkacon
OpenCMS is a content management system based on Java and XML. It can be used to manage content on a public Website without requiring any coding skills. It also has an approval workflow to ensure review of the content pushed to the public site. Check out some of the sample sites here.
Some of the key features of OpenCMS are WYSIWYG editor, Preview function, JSP integration, Structured content, image processing, search engine, unicode support, security permission system, undelete support, WebDAV support, advanced user management and context menus based on Ajax.