Apache Lenya
Apache Lenya is a Java-based Open-Source Content Management System. It is based on open standards such as XML and XSLT. One of its core components is Cocoon from the Apache Software Foundation.

Cofax
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.

Daisy
Daisy is a comprehensive content management application framework, consisting of a standalone repository server accessible through HTTP/XML and/or a high-level (remote) Java API, and an extensive browsing and editing DaisyWiki application running inside Apache Cocoon. Daisy is licensed under the commercially-friendly Apache License 2.0.

eAdmin/OWX
Java JSP based SiteEditor, CMS, list generator software. It Includes: Modules, XML config, Struts, own API, Components, WYSIWYG, multilanguage, multiuser, webbased manager.

InfoGlue
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 organisations. Typical uses include public websites, portal solutions, intranets and extranets. The platform is released under the GPL-license and it can be run on almost any platform and most known databases.

Ion
The ion project is an effort to provide a very simple but powerful content management system based on the most recents technologies. Ion is 100% compliant with J2EE standards, uses XML to define contents structures, XSL to provide rendered contents in many format (HTML, XML, PDF, TXT, ...), and JSP with JSTL as a template system.

Jahia
Jahia is a mid-range Content Management and Corporate Portal Framework. It integrates in one single package a full web application platform suite.

JBoss Nukes
Nukes on JBoss is a full fledged Content Management System (CMS) with advanced user/group management, security rules and pluggable components. Components can be deployed at runtime while the application is running. It is all written in JBoss.

Magnolia
Magnolia is the first open-source content-management-system (CMS) which has been built from scratch to support the upcoming standard API for java content repositories (JCR).

MMBase
MMBase is a Web Content Management System with strong multi media features. MMBase has a large installed base in The Netherlands, and is used by major Dutch broadcasters, publishers, educational institutes, national and local governments. MMBase is written in Java, it is Open Source Software (MPL) and all standards used are as 'open' as possible.