ScummVM - 'virtual machine' for several classic graphical point-and-click adventure games.
It is designed to run: Adventure Soft's Simon the Sorcerer 1 and 2; Revolution's Beneath A Steel Sky, Broken Sword 1 and Broken Sword 2; Flight of the Amazon Queen; and games based on LucasArts' SCUMM (Script Creation Utility for Maniac Mansion) system