The Document Outline Window in Visual Studio 2005 is a hierarchical view of the controls on a form, but it's not just read-only. You can use it to "visually refactor" an app by reordering controls into containers with unhooking the event handlers.
As open source becomes entwined with the profit sector, the ancient GNU Public License is showing its age. Will the new version help developers avoid the legal thicket of alternate licenses?