GrabCaptureScreen is a easy to use software which will help you make screenshots.
Press a key (or key combination), and the program will save to a predefined folder, with auto numbering. Either bmp, gif, jpg, png or tga. Specify image operations to be done automatically: resize, change gamma, etc.
Use the "any key" for grabbing: this can be a combination of up to 4 controller keys: keyboard, mouse, even joysticks!
The other screenshot mode is "capturing" and is what you know from most other screenshot programs. Interactive, using a standard MDI interface. You can auto save captures, auto print, auto copy to clipboard. Image operations available: Flip, mirror, rotate, invert, crop, add a mouse cursor, resize the image, change image gamma, color depth, send your screenshots by email and much more. Capture modes available: desktop, single (sub-) window, multi-monitor desktops, alternate monitor desktop, active window, rectangular area, fixed rectangle.