Just a Few Interesting Links

https://nameid.org/: A project of mine which uses Namecoin identities to provide OpenID logins.
http://www.freie-software.net/: A site I run with a few pages about freedom and free software. In German.
http://reviewsundmehr.blogspot.com/: My sister's blog with reviews of films and books (mostly fantasy). In German.
https://www.fsf.org/: The Free Software Foundation, which promotes (obviously) free software and also has some interesting essays about the issues resolving around it.
https://www.eff.org/: Ditto for the Electronic Frontier Foundation.
http://www.vgt.at/: A very active and successful animal rights group in Austria, headed by Martin Balluch.
http://www.openstreetmap.org/: A free map of the world, made by volunteers. I think this is a very useful and also interesting project—and it will probably soon have a more detailed and up-to-date map as proprietary providers (actually this is already true right now for certain regions and cities).
http://bitcoin.org/: A decentralised, peer-to-peer digital currency that provides freedom of money for everyone. It is resistant to seizures and censorship.
https://www.torproject.org/: Protect your privacy online by using Tor!
https://f-droid.org/: Repository of free Android apps, including mine. I found lots of interesting and useful stuff there, and use it instead of Google Play.