list of ruby facebook client libraries

Because often time I would get asked about this,
I can't just say "just pick rest-graph".

Lexical ordering.

https://github.com/appoxy/mini_fb
https://github.com/arsduo/koala
https://github.com/cardinalblue/rest-graph
https://github.com/mmangino/facebooker2
https://github.com/mmangino/mogli
https://github.com/nov/fb_graph

Looking through all of them, I still feel pretty confident
about rest-graph..

Though I don't know why people would pick one over another,
and I'm very, very curious about it. So that I can improve
rest-graph more, instead of just feeling good about it.