Windows Workflow Foundation (WWF) is an extensible programming model and runtime components for building solutions on the Windows platform. As a platform component, Windows Workflow Foundation will be included with the WinFx runtime components 3.0. WWF will also be available as a downloadable component in the second half of 2006.
Goto : http://www.windowsworkflow.net/default.aspx?tabindex=0&tabid=1