BeanShell
Updated FreeSwingTestApps and finally tried out BeanShell. I am impressed! It is a great way to quickly test out some things. It builds out of the box with GNU Classpath. The swing gui needs some work, but you can actually try some Free Swing stuff now. And Robert made BshBot that you can see in action when you visit #classpath on irc.gnu.org (when Robert is online).