if you're active (run, bike, weights, ANYTHING etc), you can be raising money for many good causes by logging your workouts on the Plus3Network

Big businesses pledge funds per miles etc. So my 2 hours this morning, meant SRAM donated $0.48 to World Bicycle Relief

There isn't a catch, although at the moment the charities are USA oriented. I like it, its free. At the moment Garmin are the upload of choice but you can enter workouts manually and they're talking to other GPS peeps.

http://www.plus3network.com/home#