LoginRadius is a Software As A Service (SAAS) which adds social logins on a website. The fundamental idea is to eliminate lengthy registration process so that users can log in to a website with their existing ID, hence saving end users’ time and making process simpler. Its based on OpenID and oAuth Standards and enables over 15 social logins such as Google, Facebook, OpenID etc which are comprising of userbase of over 1 billion users. Registration is a thing of past now!
Implementation of LoginRadius is quick and easy and they have a detailed documentation section to know technical aspects of the SAAS. Its recommended that you watch their quick 2 minute video to understand concept and working of this SAAS. It also offer wide range of user profile data from all the integrated ID providers and an advance social analytics. You can choose social icons and interfaces. LoginRadius is available in 9 languages.
Live demo: http://www.loginradius.com/loginradius/demo.aspx
YouTube link of the video: http://youtu.be/mLYbVNsU36U