Redmine Social Sign In
Plugin into Redmine that enables sign in through social network like Google+, Facebook, Twitter or LinkedIn
Install
Copy plugin into [redmine_app]/plugins/redmine_social_sign_in directory Run "bundle update" from [redmine_app] command line and restart your web server
Setup
Go to Administration -> Plugins -> Social Sign In and click to "Configure" button. Enable your social network and fill OAuth credentials like "Client ID" and "Client secret"