Devise
Flexible authentication solution for Rails with Warden
Devise is a flexible authentication solution for Rails that is based on Warden, a general Rack authentication framework. It is a complete MVC solution based on Rails engines that lets you have several models signed in at the same time. It consists of 10 modules:
1. Authenticatable Module, responsible for password hashing and validating user authenticity when signing in
2. Omniauthable adds OmniAuth support
3. Confirmable is responsible for verifying if an account is already confirmed...