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.
MMBase is an object-relational mapping tool to build advanced web applications. If you are looking for an MMBase-style Enterprise Web Content Management System, please go to the CMScontainer.org.
Cofax is a web-based text and multimedia publication system. It was designed to simplify the presentation of newspapers on the Web and to expedite real-time Web publication.
Apache OFBiz® is an open source product for the automation of enterprise processes that includes framework components and business applications for ERP (Enterprise Resource Planning), CRM (Customer Relationship Management), E-Business / E-Commerce, SCM (Supply Chain Management), MRP (Manufacturin
InfoGlue is an advanced, scalable and robust content management / Portal platform written in 100% Java. It is suitable for a wide range of applications and organizations. Typical uses include public websites, portal solutions, intranets and extranets
XWiki is a Second Generation Wiki and as such, it's a runtime platform for developing collaborative web applications. It's very versatile and you can modify any part of the XWiki runtime to match your requirements.