AutoIt Windows Screenshooter
Key Features:
takes easily a screenshot from any visible window
capture any region of the desktop incl. freehand capturing
capture GUI controls and GUI menus separately
capture a marked area every x seconds for a duration of y seconds
create a GIF animation from saved frames (Vista or higher os required)
capture to AVI file (without audio!)
takes a screenshot from web sites (available only on Win7+ os and when Aero