CuppaWEB v2 is an existing commercial Content Management System based on Java/J2EE. CuppaWEB has too many features to document here but here is a few. Multiple output formats through pluggable format modules (Currently HTML,PDF,Print), Personalised content, WYSIWYG Content Authoring requiring no HTML knowledge, version tracking, content publish scheduling, and many more.
A simple web application used to view and manage Java Content Repositories (1 & 2). The application supports viewing the contents of a repository through a tree view, or through querying (XPath, SQL) or searching the entire repository. Supports CRUD operations on Nodes and properties. Provides a Groovy environment to execute and save repetitive complex operations against the repository. Mirrored at http://code.google.com/p/sptjcrmanager/ since Kenai is being shut down by Oracle.