A nice list of WPF (Windows Presentation Foundation) applications to try out - requires .Net 3.0

Check out this list of WPF applications to try out.

You will be hearing about WPF more as Visual Studio 2008 gets closer to RTM, and as more people adopt .NET Framework 3.0.

Of course, you can develop WPF applications today with Visual Studio 2005 and the updated SDKs, but I have a sneaking suspicion that it won't take off until Visual Studio 2008 comes out.

Not sure what WPF is? Wikipedia has a nice article about it here.