On Free-DC donation page (http://stats.free-dc.org/stats.php?page=donate) there is a Bitcoin address and it's possible to donate BTC to Free-DC.

I was wondering if it would be possible to include a Gridcoin address also? Gridcoin (GRC) is a digital currency rewarding BOINC computations, I am sure that many Gridcoin members would welcome an opportunity to donate to Free-DC in digital currency they find most closely associated with BOINC and distributed computing. Bitcoin, on the other hand, was always associated with Proof-of-Work mining through SHA-256 hashing algorithm, nothing in common with distributed computing and actually diverting quite a lot of computing resources from it.

http://www.gridcoin.us