Diaspora is something I've been hoping can change things for quite a while now, but it's moving along fairly slowly. It's a decentralized social network (anyone can set up a pod for others to use.) that if sorted out enough, could really take off. It's currently needing some work done to get it sorted out, but hopefully that'll be done over time. Site is here :
https://joindiaspora.com/More info on it here :
http://en.wikipedia.org/wiki/Diaspora_%28social_network%29Ah, and yeah, for many here this pod might be of interest :
https://www.cryptospora.net/edit : Will make sure to look at Yacy too, thanks for sharing!