Boinc.berkeley.edu

From Wikidweb

Berkeley Open Infrastructure for Network Computing

Description: BOINC is open-source software for volunteer computing and desktop grid computing. Computer users anywhere in the world can use the idle time on their computers (Windows, Mac, or Linux) to cure diseases, study global warming, discover pulsars, and do many other types of scientific research. It's safe, secure, and easy.
--http://boinc.berkeley.edu