Do you remember the Lucasarts games? Sam and max? Monkey Island?
Well now you can play them using SCUMM. Basically, most modern PCs using XP etc can't get the hang of these old games (either refusing to run or looking mighty odd).
Using this site you can relive your past. I know I will!
Here's the site's main quote: "What is ScummVM?
ScummVM is a '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. SCUMM is used for many games, including Monkey Island, Day of the Tentacle, Sam and Max and more. Compatibility with supported games is continually improving, so check back often."