YoshiNES is a Visual Basic Nes emulator. It's a modification of BasicNES, made by Don Jarret and David Finch. The BasicNES is a good emulator, but can be better. The YoshiNES have more stuff than BasicNES, like Pattern Table view, Pallete viewer, a lot of mappers, more filters, and more features.
Supported mappers:
1-13, 15-19, 21-24, 26, 32-34, 40, 45, 47, 51, 53, 57, 61, 64-66, 68-69, 71, 73-75, 78-79, 83, 85, 88, 90-91, 94-95, 99-100, 115, 117-118, 130, 160, 151-152, 158, 185, 188, 200, 211-212, 226-228, 230-232, 245, 250, 255.
Some games still very buggy and unplayable. The sound engine are almost the same of BasicNES. The sound use Midi Output, so, the games sounds wrongly sometimes.