Simple Signup Form – jQuery Plugin
Pantherius
Build responsive sign up form with email notification. Provides Visual Builder and lot of customization options.
Ryan Johnson
Empower your users to easily login via Facebook with this simple jQuery plugin
Facebook Login/Like/Share Plugin
Grizzly New Technologies GmbH
jQuery Facebook Plugin enables websites to offer an full ajax based authentication and login/registration process based on the Facebook JavaScript SDK. Beside that, the plugin offers functionality for adding Like buttons and other social widgets to websites easily.