Authentication plugins allow you to connect your Moodle to different authentication systems so that you don't need to create new accounts in Moodle.
Join the discussions about authentication plugins in the Authentication forum.
The goal of this authentication plug-in is to make sure that each user in Moodle only has one active session simultaneously. Any comments on this plug-in should be made at the forums. The development of this plug-in was sponsored by http://www.afb.pt. == Este plug-in de autenticação tem como objectivo garantir que cada utilizador apenas tem uma sessão activa ao mesmo tempo. Comentários sobre este plug-in devem ser feitos através dos fóruns do Moodle. O desenvolvimento deste plug-in foi patrocinado por http://www.afb.pt.
This plugin gives you an easy way of letting your users login through their facebook, twitter, google or linkedin accounts. Once installed and configured, this plugin offers a hassle free method for both the moodle admins & end users. Accounts get created without any additional action from the admin.
Sign-in with your Google / Facebook / Github / Linkedin / Windows Live account. The first time you sign-in, a new account is created.
SAML Authentication plugin based on the simplesamlphp software. (Also install the SAML Enrolment plugin if you want auto-enrol based on SAML)
Provides email-based self-registration with admin confirmation instead of user confirmation.
Single Sign On from MediaWiki (developed with version 1.21) to Moodle 2.3. Users signed in to MediaWiki can jump to Moodle and have accounts automatically created there and they will be logged straight in. This plugin does not deal with enrollments at all.
The Windows Live™ authentication plugin allows you to simultaneously log in to your Moodle course and MS Live account so you only need one username and password. You will see a link to "Sign in with MS Live ID" to the right of the Moodle login. It authenticates your Windows Live ID and signs you into your Moodle course, giving you access to the features of the Microsoft Live Services block from within the course.
Automatically creates Moodle accounts and authenticates user identities via SAML from the OneLogin.com service. http://support.onelogin.com/entries/20508233-configuring-saml-for-moodle2