Possibly the best Nintendo NES emulator available.
It's compatible with an enormous amount of games, more than any other emulator.
Although this emulator is for DOS, it has a nice, but slightly weird GUI,
so you don't need to use the command line.
One drawback is that it hasn't been updated in ages.
This could mean there won't be anymore updates, which is too bad.
However the README.TXT file says an update won't come soon so maybe...
| fwNES 0.302
|| Nov 15, 1998
|| 867 Kb.