Module project 6.x 7.x notes Bakery Single Sign-On System http://drupal.org/project/bakery Y Y supports second-level domain single sign-on only OpenID Single Sign On Relying Party http://drupal.org/project/openid_sso_relying Y Y CAS http://drupal.org/project/cas Y Y OAuth Connector http://drupal.org/project/oauthconnector ? Y Various OAuth providers. Requires OAuth V3 OAuth Provider http://drupal.org/project/oauthloginprovider Y Y Services single sign-on server helper http://drupal.org/project/services_sso_server_helper N/A Y Services single sign-on client http://drupal.org/project/services_sso_client Y Y http://imagexmedia.com/blog/2012/1/services-single-sign-client Facebook Connect http://drupal.org/project/fbconnect Y Y Facebook OAuth http://drupal.org/project/fboauth Y Y No dependencies. Sponsored by Lullabot Twitter http://drupal.org/project/twitter ? Y Single sign on http://drupal.org/project/sso Y N TenderApp SSO http://drupal.org/project/tenderapp_sso Y N 3rd party pay LDAP Single Sign On http://drupal.org/project/ldap_sso Y N OpenID Single Sign On Provider http://drupal.org/project/openid_sso_provider Y N FBConnect Bridge http://drupal.org/project/fbconnect_bridge Y N Network Manager http://drupal.org/project/network_manager Y N Account Sync http://drupal.org/project/account_sync Y N Fierce SSO http://drupal.org/project/fierce_sso N N Google Apps Authentication http://drupal.org/project/googleauth N N