MESS is an acronym that stands for Multi Emulator Super System. MESS will
more or less faithfully reproduce computer and console systems on a PC.
MESS can currently emulate over 250 systems from the last 5 decades.

MESS emulates the hardware of the systems and sometimes utilizes ROM
images to load programs and games. Therefore, these systems are NOT
simulations, but the actual emulations of the hardware.

WWW: http://www.mess.org/