Passport.jspassport.authenticate('facebook');('google');('apple');('microsoft');('twitter');('linkedin');('github');('openid'); Passport is authentication middleware for Node.js. Extremely flexible and modular, Passport can be unobtrusively dropped in to any Express-based web application. A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more.
HybridAuth, open source social sign on php library
Xlune::Bookmark: rubycas-server - Google Code
