I don't know if this is the best place to post this, but I was real interested in the Calyx Institute when they were in the news a while back, and now they've announced that they're accepting Bitcoin donations:
https://twitter.com/calyxinstitute/status/326366637995479040
https://www.calyxinstitute.org/support-us/donate-via-bitcoin

Their goal is to help make the network backbones all encrypted and care about user privacy. I think it's a pretty worthy cause.