AppFabric is a set of integrated technologies that make it easier to build, scale, and manage Web and composite applications that run on IIS. Windows Sever AppFabric targets applications built using ASP.NET, Windows Communications Foundation (WCF), and Windows Workflow Foundation (WF). It provides out-of-the-box capabilities for you to easily build and manage composite applications, including:
Find samples and learn more about AppFabric at the MSDN AppFabric Developer Center.