ERYX is a flexible, fast and easy-to-use XML content management system with a whole bunch of integration opportunities for XHTML, Flash, InDesign, PDF, and any web-based software that makes excessive use of XML-files. Needs PHP 5.2+. http://eryx.imgb.org
Very nice idea to have a cross media CMS, sad it's stopped development. It's working nice on my install, except for the setting menu, i can't change edit mode to advanced, if anyone has a clue.