Facebook Connect is described as 'set of APIs from Facebook that enable Facebook members to log onto third-party websites, applications, mobile devices and gaming systems with their Facebook identity' and is an website. There are more than 10 alternatives to Facebook Connect, not only websites but also apps for a variety of platforms, including iPhone, Android, Mac and Windows. The best alternative is OpenID, which is both free and Open Source. Other great sites and apps similar to Facebook Connect are OAuth, humanID, itsme and Unikname Connect.
OpenID is an open standard that describes how users can be authenticated in a decentralized manner, eliminating the need for services to provide their own ad hoc systems and allowing users to consolidate their digital identities.
OAuth is an open standard for authorization. It allows users to share their private resources (e.g. photos, videos, contact lists) stored on one site with another site without having to hand out their credentials, typically supplying username and password tokens instead.
A project of the Bluenumber Foundation, humanID is an independent single sign-on built for privacy and designed to restore integrity to the web. We believe the path to a safer internet is a user-centric digital identity system that is both accountable and anonymous.
Place a button on your site or application which allows Twitter users to enjoy the benefits of a registered user account in as little as one click. Works on websites, iOS, mobile and desktop applications.
IndieAuth is a way to use your own domain name to sign in to websites. It works by linking your website to authentication providers such as Twitter or Google, then entering your domain name in the login form on websites that support IndieAuth.