Google Chrome: If you're looking for an easy way to screenshot web pages from within Google Chrome, Awesome Screenshot is a versatile Chrome screenshot tool.
Awesome Screenshot makes it easy to grab both the visible portion and the entire web page with a single click. You can scroll through your capture, crop it and easily blur portions that contain private data you don't want to share. You can annotate the image with text, circles, arrows, and lines in varying colours for emphasis and clarity.
Once you've captured and annotated your screenshot you can then save the image to your computer or share the image. Your image is uploaded to the Pict image sharing site and quick links are provided for copying the URL, sharing on Twitter, Facebook and Google Buzz or emailing using GMail, Yahoo! Mail or Hotmail. Awesome Screenshot is free, requires no registration and works wherever Chrome does.