Social Login allows your users to connect with one click to your Simple Machines Forum by using their social network account. Over twenty different social networks such as Facebook, Twitter, LinkedIn, Google, Yahoo, GitHub, Windows Live and others supported.
Social Login increases your registration rate
Social Login for SMF increases the user registration rate of your Simple Machines Forum by simplifying the registration process. Get rid of long forms and complicated captchas by allowing new users to sign-up with their existing social network account.
Gather rich demographic information (age, gender, phone numbers ...) about your users without requiring them to fill out any forms. Obtain pre-validated email addresses and increase your data quality.
Social Login simplifies the login process
Your existing SMF users can link their regular account to one or more social networks and can then use these social network accounts to login. Eliminate the issues of forgotten usernames and passwords!
Social Login integrates with your existing system
Social Login seamlessly integrates into your Simple Machines Forum so you and your users don't have to start from scratch.
Supported Social Networks: Facebook, Google, Twitter, LinkedIn, Yahoo, PayPal, Foursquare, YouTube, Hyves, OpenID, LiveJournal, Steam, Wordpress.com, StackExchange, Windows Live, Disqus, Blogger, Github.com, Skyrock.com, VKontakte, Odnoklassniki, Mail.ru.
More:
http://docs.oneall.com/plugins/guide/social-login-smf/#install