Is there any API available for connecting to all possible social networks (mainly facebook, linkedin, twitter, github, bitbucket, codeplex, stackexchange, google code) I am basically looking for one ...
Which social sign-in (Google, twitter, fb, etc) is most often used (if I could only choose one, which would statistically retain the most users)?
I am working with a startup which is about to do its launch in maybe 2-3 weeks. In order to see the primary features of the site, the user has to register or sign in if they have already registered. ...