A devise Omniauth server which handles Single Sign On

Rails SSO with Devise and OmniAuth. This is the client, provider can be found here.

Rails SSO with Devise and OmniAuth. This is the provider, client can be found here - https://github.com/rishabhp/sso-rails-client

OAuth2 SSO Provider with Devise and OmniAuth, The client is here: https://github.com/sangkyoonnam/oauth2-sso-client