Microsoft's Snipping Tool comes already installed on Windows Vista and Windows 7.
Capture full screen, active window, rectangular area, and freehand region after launching program. Output to file or email.
No hotkeys, auto save, delayed capture, or auto-scroll. No printer output. Editor only allows highlighting and freehand line drawing.http://windows.microsoft.com/en-US/windows7/products/features/snipping-tool
64 Bit version available
Save resulting images as PNG, GIF, JPG, & MHT