Shooting in RAW, with RAW Average, RAW Sum, and RAW Develop features
Shutter-priority (Tv) exposure - via shutter value override feature
Aperture-priority (Av) exposure - via aperture value override feature
Shutter, Aperture, and ISO Overrides
Ultra-long shutter speeds - up to 64 seconds, and much longer on some cameras.
Ultra-fast shutter speeds - up to 1/10,000" and higher
Customizable high-speed continuous (burst) Shutter-based (Tv), aperture-based (Av) and ISO-based exposure bracketing (unlimited shots)
Focus bracketing (unlimited shots)
High-speed Flash Sync at all speeds up to 1/64,000 second (even faster in some cameras)
Interface improvements: Edit
Custom user-editable visible Grids for framing, cropping, and alignment
Fully customizable CHDK display, info placement, user-colors, fonts in menus, etc.
Zebra mode (a live view of over and under-exposed areas of your picture)
Battery indicator
Live histogram (RGB, blended, luminance and for each RGB channel)
RAW and Video space-remaining gauges with custom low-limit alerts
Custom CHDK user menu (for instant recall of up to 10 favorite functions)
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Extra Video Features:
99 constant bit-rate and 10 constant-quality video compression levels
Elimination of 1 Gig video-size limit
Zoom during video function (for cameras without this feature)
Apps and extras:
Depth-of-field (DOF)-calculator, Hyperfocal-calculator with instant Hyperfocal and Infinity focus-set, and more
File browser
Text reader
Calendar
Some fun tools and games