Silva is a CMS for organizations that manage multiple or complex Web sites. Content is stored in clean XML, independent of layout and presentation. Features include versioning, a workflow system, an integral visual editor, content reuse, sophisticated access control, multi-site management, extensive import/export facilities, fine-grained templating, and hi-res image storage and manipulation. Silva is built on top of the Zope Web application platform.
GroupServer is a Web-based mailing list manager designed for large sites. It provides email interaction like a traditional mailing list manager but also supports reading, searching, and posting of messages and files via the Web. Users have forum-style profiles, and can manage their email addresses and other settings using the same Web interface. It has supports features such as Atom feeds, a basic CMS, statistics, multiple verified addresses per user, and bounce detection, and is able to be heavily customized.
SilkPage is an XML-based Web publishing framework that has evolved from the Docbook Website. With strong foundations in XML, it is a publishing framework with a focus on Web standards and usability. It is particularly suited for publishing personal websites, though it is by no means limited to them.
XPcm is a flexible PHP based content management framework which allows you to easily create and manage your websites. XML and XSLT are used for dynamic page creation and search-engine friendly content rendering. It features Workflows, task management, a WYSIWYG editor, user and group/role management with permission-inheritance, a media-database, module and plug-in support, flexible caching, and a fully browser-based back office.