Microsoft have released Debugger Canvas for Visual Studio which is an interesting new way to debug ones code. It is a combination of two research projects Code Canvas from the Human Interactions in Programming Group at Microsoft Research and Code Bubbles from Brown University.
Debugger Canvas is a new user experience for the debugger in Visual Studio Ultimate. It pulls together the code you’re exploring onto a single pan-and-zoom display. As you hit breakpoints or step into code, Debugger Canvas shows just the methods that you’re debugging, with call lines and local variables, to help you see the bigger picture.
See the Debugger Canvas site for more information: