video game console emulator
program that reproduces video game console's behavior
Genesis Plus
Mega Drive emulator
Stella
emulator for the Atari 2600 game console
Gens
freeware emulator of Sega Mega Drive
MESS
emulation software that aims to recreate the hardware of many classic home computer systems
Dolphin
Nintendo GameCube and Wii emulation software
Nebula
CPS-1/2 and Neo Geo emulator
Xenia
PC emulator of the Xbox 360 console