FastStone Capture is a powerful, flexible and intuitive screen-capture
utility. It allows you to capture anything on the screen including windows,
objects, full screen, rectangle regions, freehand-selected regions and
scrolling windows/web pages. It has innovative features such as a floating
Capture Panel, hotkeys, resizing, cropping, text annotation, printing,
e-mailing, screen magnifier and many more.

http://www.faststone.org/FSCaptureDetail.htm