Google Sign-In - Google Sign-In is a secure authentication system that enables users to sign in with their Google accounts.
Double - Tinder for double dates
uLogin - uLogin is a convenient service to login via social networks.
Facebook Login - Facebook Login is a secure, fast and convenient way for people to log into your app or website.
Unigma - Unified cloud monitoring, built for IT service providers.
Reddit Login - OAuth2 support allows you to use Reddit to authenticate on non-reddit websites and applications.