Add features to canon point and shoot cameras
 

Posted on slashdot - CHDK firmware add on for canon cameras lets you upgrade your point and shoot camera firmware with the following features:
Shooting in RAW, with RAW Average, RAW Sum, and RAW Develop features
Live histogram (RGB, blended, luminance and for each RGB channel)
Zebra mode (live-view under/over-exposure subject-area alerts)
DOF-calculator, Hyperfocal-calculator with instant Hyperfocal and Infinity focus-set, and more
Battery indicator
RAW and Video space-remaining gauges with custom low-limit alerts
Scripts execution (exposure/focus/bracketing, intervalometer and more)
USB-cable remote shutter-release
Motion-Detection triggered photography (fast enough to capture lightning strikes)
Customizable high-speed continuous (burst) Tv, Av, ISO, and Focus bracketing (unlimited shots)
99 constant bit-rate and 10 constant-quality video compression levels
1 Gig video-size limit removed in earlier cameras
Zoom during video for cameras without
Shutter, Aperture, and ISO Overrides (shutter speeds of 64" to 1/10,000" and higher)
High-speed Flash Sync at all speeds up to 1/64,000 second (even faster in some cameras)
Custom framing, cropping, and alignment viewfinder Grids (user editable)
File browser
Text reader
Calendar
Some fun tools and games :)
Fully customizable CHDK display, info placement, user-colors, fonts in menus, etc.
Custom CHDK User-Menu (for instant recall of up to 10 favorite functions)
And other features too numerous to mention here. See the CHDK Firmware and Allbest Firmware usage pages for a more complete overview.