NES emulator written by a guy by the name of "Marat Fayzullin". Sadly, it's binary-only, because the guy sells the Windows and Mac OS ports. Binary-only ports to other OS's are freely downloadable. While I have no problem with such an idiot tax, I'd like to be able to modify it so it uses esd instead of directly acessing /dev/dsp.

you can get it at http://www.komkon.org/fms/iNES/