GonzoJohn tells us about an article at LinuxOrbit.com: "Screen-Grabbers! Catchy name isn't it?
Both KDE and GNOME are full of helpful small applications for specific tasks. 'Screen-Grabbers' are applications that will take a picture of your desktop or a window on your desktop, and save the picture as an image file, like a PNG or JPG.
What can screen-grabbers be useful for? Well, for one thing, they make documenting applications a lot easier. And of course, technical writers like myself find them indispensable. Linux desktop users can also take advantage of these screen-grabbers to capture error messages for hunting down the solution to problems."