Vocabulary Trainer is running on Jeode and it is put under the GPL.
Get it from here:
You can first look at it:
Source is available, too. Check the download section to get it all, of cause its not found in the i-package.
The program is pre-configured for use on a VGA-display, but it features a configuration file where you can try to tweak it for other displays. If you have the parameters for the Z5x0, please submit them to me, so I can add it to the configuration file. Contact mail is found at the website.
Jeode is great! I've started this program with Kopi, and it was fun to get back to Java this way.