Charity Engine 7.0

Charity Engine was created to enable millions of home PCs to raise millions of dollars for the best possible causes, all thanks to spare computing power that nobody is using anyway.
Charity Engine takes enormous, expensive computing jobs and chops them into 1000s of small pieces, each simple enough for a home PC to work on as a background task. Once each PC has finished its part of the puzzle, it sends back the correct answer and earns some money for charity - and for the prize fund.