Your computer does nothing at all most of the time.  Rather than squandering this computing resource, why not make better use of it?

Below are links to projects that will benefit from donations of your spare computer power ranging from searching for cures for disease through to finding new planets or impending asteroid collisions.  Among these worthy causes you may find one close to your heart, or perhaps to your interested in abstruse mathematical theorems.

• The curiously named BOINC range of scientific research projects at Berkley University
• A huge range of distributed computing projects
• Openscientist’s preferred suggestions for projects that you computer can support

I hope you enjoy the pleasant sense of shared purpose from supporting your chosen cause!