Whether you're the only person behind a web site or a team, Google Friend Connect lets you select a gaggle of social networking features to include on your web site with little effort. All you have to do is pick the features, copy the code and paste the code into your site. Friend Connect API is available to those who know their way around APIs. With Google Friend Connect, users can connect with the site and each other.
A Google Friend Connect enabled site gives users a way to sign in without having to create a new account. Visitors can use their existing Google, Yahoo, AIM or OpenID login to sign in. Chances are good that most people will already have at least one of these IDs.