free alternative to setiathome and distributed.net?

[John Fry <john+usenet@johnfry.org>]

Hi,

Lately I've been weaning myself away from all software in contrib and non-free.
 One contrib package I used to run was setiathome.

I'm wondering if there's a distributed computing project out there that's worthy
of my spare cycles and 100% free?

I know about distributed-net but it's in non-free.

Cheers,

John