I have started to play around with UI Automation in order to write automated UI tests. There is a lot to do for a setup of such tests. So I am wondering if there is already a framework for this purpose. After asking the internet a bit I found Guia on Codeplex. It seems to be the right tool for us. The key features from my point of view are:
It works with WPF and WinForms.
No compiled application is needed, windows and user controls can be tested stand-alone.
NUnit is supported.
The project is on a very, very early stage. So I keep an eye on it for it really seems to be a useful thing for us.
Update (29 July 2011):
Sadly, the project does not make any progress at all. We have meanwhile implemented our own framework which of course fits our needs perfectly.