Electronic Frontier Foundation
The Electronic Frontier Foundation defends our privacy and digital rights through legal actions, watchdog initiatives (such as their investigation into printers that print tracking dots on each print job), and software such as HTTPS Everywhere. In a world filled with powerful interests that want to stamp out digital freedoms, the EFF advocates on behalf of the digital users.
They have a donation page here: https://supporters.eff.org/donate. If you read this by Dec 31 2011, their December donation drive will see your donation matched by another foundation (but we will make the FLOSS Fund donation when it comes up in queue).