NESCafe is a NES Emulator written entirely in Java and will run on any platform. It runs hundreds of the old great Nintendo games and was the first Java NES emulator to emulate the sound hardware.

Here's whatsnew:
- Fixed bug where Save States were not working for indirect URLs in Applet Tags
- General maintenance improvements and updates to documentation

Get it here:
http://www.daviddn.com/nescafe/