In my previous job about 2 years ago, my team made a couple of apps for elementary kids in Texas. It's supposed to be commercial, but never seen it in the shelves, probably in Texas.
Pretty nice app with custom components, JFC, JNI(for printing, JDK 1.1 has dismal printing support).
Runs well both in PC and Mac, had to do lots of tweaking though.
Oh well, it was fun while it lasted
There's also a monitor program for VPN written in Java, I don't remember the vendor.