I've known about the pretty amazing Open Source CMS site for a while, but recently bumped into the CMS Matrix. I spent an hour or so browsing throgh all the entries, ten by ten, listing all of the open source Java products. Here they are, in case anyone is interested:
- Apache Lenya
- BrowserCMS
- C1
- CMS Genie
- Cofax
- Contelligent
- dotCMS
- EPAM CMS
- Enfinity Suite 6
- eXo Platform
- Harmonise
- imCMS
- InfoGlue
- Liferay Portal/CMS
- Lutece
- Magnolia
- MeshCMS
- OpenCms
- OpenEdit
- WebCT95