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)

READ MORE - Awesome Screenshot

Aviary has introduced Falcon, a web based image editing tool. With Falcon, you can capture images and web pages from your browser and crop, resize, and mark them up. Mark up options include text, shapes, colors, and more.

The best part about this is that it is web based so there is no software to install. I found it easy to use and very fast and responsive. This is a great alternative to desktop based image editors, especially for schools, as students can use it from home also.

It is free and you can save your files to your free account or download them.

UPDATE - There is also an Aviary extension available for Firefox and Chrome. One click and you are off and screen capturing, editing, etc.

READ MORE - Aviary Falcon - online image markup