This is really new, but It’s still pretty good. Remember the Seti@home software you could down load years back, well its still running, but now there’s 10 other projects running to, and you can download all of them if you want and run them on your computer when it’s not doing anything.
My favourite ones are:
BBC Climate Change Experiment – Save the planet (running for half the time on my work computer)
LHC@Home – CERN’s particle accelerator
Einstein@Home – Pulsar search
SETI@home – Hello world!
#Flag: software, links