CHDK
"Unleash the POWER in your PowerShot!" Add RAW support, scripting, and more to Canon cameras that couldn't support it before. (My A520 is not currently supported.)
Jeremy Smith's Blog: Success! IE 6, 7, and 8 Running on Same Machine (Plus 5.5 and 5.01)
Dave Dribin's blog: The Bouncer
Bouncing OSX dock icons to "The Blue Danube."