Windows
Zsnes = Excellent SNES emulator
Gens = Superb Sega MD/Genesis emulator (plus you can play 2 player games online)
FreezeSMS = Wonderful Sega MS/GG emulator
Stella = Amazing A2600 emulator
WinUAE = Amiga on drugs emulator
Epsxe = Pain in the ass to set up, but once done it emulates PSX nicely.
I use the above and recommend them all.
