You’ve built your site on Umbraco, the developer-friendly CMS. You would like to provide a single-sign on experience for your users, whether using a social identity provider such as Facebook, Windows Live ID, Google, or Yahoo, or an Active Directory or other provider with federation capabilities. Now you can. Easily.
Made available in conjunction with the release of a new version of Windows Azure AppFabric Access Control Service (ACS), the Access Control Service (ACS) Extensions for Umbraco augment your web site with powerful identity and access management capabilities. Best of all, you can manage your users and access policies though the familiar Umbraco management UI, without the hassle of maintaining passwords for them!