Awesome Screenshot is an extension for Google Chrome that allows you to screen capture and annotate web sites and images from web pages. You can capture the entire page, or just a section of it. Awesome Screenshot will open a new tab with an editing toolbar for you to use. You can save the image to your computer or upload it to a website. It is free and there is no account registration needed.
It is very easy to use and can come in handy for people like me who use screen captures in my blog. The screen shot above was made using Awesome Screenshot.
(found on Lifehacker)