Berkeley Open Infrastructure for Network Computing (BOINC)
I just started looking at this to resume the SETI@home work I had running on my PCs in years past. Now that we have migrated to Linux and we have the horsepower to spare, I will try again.
They have changed the way they do things at SETI, and BOINC allows me to assign my PCs to work on mulitple projects. Let us see how it works.