Desktop Screenshot Whiz is a free screenshot capture tool optimized for productivity. This program save screenshots or part of the screen to a file within a second.
Desktop Screenshot Whiz offers the ability to apply text and shapes to the screenshot.

Key Features:

     Save screenshots or part of the screen to a file.
     Capture of window, region or full screenshot.
     Supports several image formats.
     Ability to apply text and shapes to the screenshot.
     Ability to adjust image quality.