Jenerator
I heard about Jenerator on the mailing list this morning. Sounds cool.
The Jenerator Version 0.9 is a code generator (Licensed under the Academic Free License version 1.1) and hosted on SourceForge, which takes meta information from different mediums, applies XSL templates and generates code. Unlike other code generators, which use JavaDoc custom tags to define and describe what is to be generated, Jenerator uses XML based Descriptor files.
It's got a heck of a list of features too: supports regeneration, EJBs, VOs, Unit Tests for JUnit and Cactus, Ant's build file, JDO source descriptor, and Servlets. While all this sounds good, I probably won't even download it - I'm just not interested as I really like how XDoclet works right now. I might change my mind in a few weeks, but I've learned too much to give it up now.