Yes, there is an alternative to Facebook that even uses facebook to log in.
I don’t do social networking. I tried it for a time but deleted my profile from that famouse facebook. Recently I heard about another project that is pretty much facebook but without the censorship of prolife messages. I didn’t delete my profile because of the censorship, which I didn’t know about at the time, I deleted because I never used it and didn’t like their attitude toward customers and privacy concerns.
Anyway, try it out. http://prolifebook.com/