Download Microsoft Active Directory Federation Services 2.0

Microsoft Active Directory Federation Services 2.0 (AD FS) helps IT
professionals efficiently deploy and manage new applications by reducing custom
implementation work, helping establish a consistent security model, and
facilitating seamless collaboration between organizations with automated
federation tools. AD FS 2.0 includes built-in interoperability via open industry
standards and claims, and implements the industry Identity Metasystem vision for
open and interoperable identity.

https://technet.microsoft.com/en-us/evalcenter/ee476597.aspx