Supported providers: (click on a name for help)
Or try one of these: (twitter logo), (facebook logo)
If you have your own website, you can use that too, by adding an OpenID or IndieAuth provider! I recommend SimpleID 1.0.2 or SelfAuth, or if you're running WordPress you can install plugins for OpenID or IndieAuth!
Much of this is specific to how I plan on implementing Authl.