ScummVM is a program which allows you to run certain classic graphical point-and-click adventure games, provided you already have their data files. The clever part about this: ScummVM just replaces the executables shipped with the games, allowing you to play them on systems for which they were never designed!
Some of the adventures ScummVM supports include Adventure Softs Simon the Sorcerer 1 and 2; Revolutions Beneath A Steel Sky, Broken Sword 1 and Broken Sword 2; Flight of the Amazon Queen; Wyrmkeeps Inherit the Earth; Coktel Visions Gobliiins; Westwood Studios The Legend of Kyrandia and games based on LucasArts SCUMM (Script Creation Utility for Maniac Mansion) system such as Monkey Island, Day of the Tentacle, Sam and Max and more. You can find a thorough list with details on which games are supported and how well on the compatibility page.
Among the systems on which you can play those games are Windows, Linux, Mac OS X, Dreamcast, PocketPC, PalmOS, AmigaOS, BeOS, OS/2, PSP, PS2, SymbianOS/EPOC and many more.
Whats New:
Support for the FREEWARE adventure Lure of the Temptress (available for download here)
Seven other new supported games: I Have no Mouth, and I Must Scream, Elvira 1 and 2, Waxworks (Amiga version only) and 3 Sierra pre-AGI games for children
Two newly available ports: iPhone and Maemo
Support for the Mac version of The Legend of Kyrandia and the Amiga version of Nippon Safes
Better support for Sierra AGI games
Improved support for modern 64-bit systems
Support for FLAC encoded music in Broken Sword 1 for the purists among you
Better support for non-English versions of games, including eastern languages
