OmniAuth is a flexible authentication system utilizing Rack middleware.
https://github.com/omniauth/omniauth
948 forks.
7.394 stars.
76 open issues.
Recent commits:

• Prepare for next dev cycle, Bobby McDonald
• Release v2.0.4, Bobby McDonald
• Remove jruby-head for now, Bobby McDonald
• Merge pull request #1041 from charlie-wasp/fix/get-request-warningWarn only on GET requests for a login path, GitHub
• Warn only on GET requests for login path, Timur Ramazanov