AutoIt Windows Screenshooter

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
capture to AVI file (without audio!)
takes a screenshot from web sites (available only on Vista+ os and when AERO is enabled)
put images to clipboard to paste to other applications easily
color picker
save image in different formats and also to PDF!
add timestamp to saved images
simple image editing options: GreyScale, b&w, invert, rotate +-90°
send image to printer and Default email client
preview of captured screens incl. zoom option
multi monitor support
display pixel color under mouse
ruler
basic image editor (paint, highlight, ellipse, rectangle, text and some graphic FX
watermark captured image
no 3rd party tools or DLLs used - pure AutoIt!
fully portable - no installation is needed