I am not sure if any others have been released, though I believe that the hp41 has been. You can find many emulators for the 41, one which works on the Pocket PC. There are some simulators out there also, you can get a simulator of the 10b 12c 15c and 16c by Lygea software, and there is a free simulator of the 16c. Free 42 has been released for windows linux and palm and is going to be released for pocket pc in the future.