Calenco is a Web collaborative platform that enable remote teams of writers, proofreader, graphic designers, translators, etc. to produce together XML documents like user guides, security procedures, etc.
Warren-CMS is a content management system with developer-provided file type handlers, built-in link and grouping management, and an XML interface that makes writing proprietary clients easy for developers who wish to do so.
Pulisher aims to be a complete website publishing and content managing system (CMS). It can run online, as a blog or CMS, creating the pages dynamically, and offline, creating static pages from a XML file that you can upload. Can import from Wordpress.