OpenID RP/OP implementation written in Rubyserved as Ruby On Rails 2.0 Plugin support OpenID 2.0 Specification easy to customize and test (no ruby-openid code) Installation./script/plugin install http://openidengine.googlecode.com/svn/trunk/openid_engine/in your RAILS_ROOT
discover Services through Yadis Protocol establish Association with OP request Authentication and get response See Alsodevelopment version developer's weblog sample code