Master_System_and_Game_Gear

See also:

Calypso - Freeware emulator for DOS.
DumpMasters - Offers a large download section.
Emukon - A freeware emulator for Windows.
Massacre Homepage - Contains many different versions of this Emulator.
Massage - Freeware emulator for DOS.
MasterGear - Commercial emulator for Win32 and freeware emulator for FreeBSD, Linux, MacOS, OS/2, OSF/1, Solaris, SunOS and WinCE.
MesaDX - A freeware emulator for Windows.
Osmose - Open source emulator for Linux and Windows.
Past-O-Rama - Freeware emulator for Win32.
Semus - Open source emulator for Windows.
SMaSher - A freeware emulator for Windows.
SMS Power - Offers current news on ROM releases as well as downloads.
vbsms+ - Open source emulator for Windows.