GrabFS is a clever MacFUSE-based file system created by Amit Singh that creates a live screenshot file system for all of your running applications.
When you run GrabFS, a new drive volume will appear. Inside, you’ll find a folder for each running application, and inside each application directory, you’ll find a tiff file for each of the application’s windows. When you drag, copy or open one of these files, you get a snapshot of the application window at that point in time.
GrabFS requires Leopard and the Leopard build of MacFUSE. I think it’s time for me to upgrade.