More of a wiki list/collection, I'm looking for a list of good Java desktop apps. I've added a couple below to get started. Please list the framework/widget toolkit being used if it's know as well.
Kodak Digital Cinema System (and I don't just say that because I wrote about 1/3rd of it including most of the gui.)
Azureus (SWT; thanks Peter) (strictly for legal purposes, of course)
Vuze (formerly Azereus) is good, but my top recomendation that I've run across is YourSQL. It's a fantastic little MySQL client for OS X and I used it for more than 1.5 years before I found out it was Java. It was very well done. None of that classic "slow unintegrated junk" many people associate with Java applications.
On a gaming front Three Rings has done an awesome job with Puzzle Pirates. Pure Java and runs great.
The Runescape game is the only Java application (it has a desktop client in Windows) that I use which isn't an IDE/Editor/Profiler.
Maple (Swing)
Had to work a lot with Maple the last week. It's such a nice and powerful tool, I first couldn't believe that it was developed with Swing and Java :)
jDiskReport
http://www.jgoodies.com/freeware/jdiskreport/
The best disk-space browser I've come across.