kegs (Kent's Emulated GS)

KEGS is an Apple IIgs emulator for Mac OS X, Linux, and Win32. The Apple
IIgs was the most powerful computer in the Apple II line. It first was
sold in 1986. An Apple IIgs has the capability to run almost all Apple
II, Apple IIe, and Apple IIc programs.

See README.Slackware for information about ROM images, audio, and
disk images.