Universal frontend with 'native' support for a fair amount of emulators. It has an easy way to add support for new emulators through .ini files. This emulator also requires a 4 meg zip file with .dlls to be downloaded. Since I'm just on a regular 28.8 I don't have the time to to download this Dll.zip. But I'll put a link to it here.
Author's website: http://www.telecom.ece.ntua.gr/~zissop/Emulator/Runner/main.html
Operating System: Win9x