Fireshot - Firefox/IE Image Snipping Tool

If you like the simplicity of the Snipping Tool in Windows Vista, you will also like FireShot, a Firefox/IE browser add-on. The cool thing about FireShot is that it allows you to edit & add annotations to an extracted image.

Steps to add a note to a extracted and cropped image -

1. Install the add-on and restart Firefox
2. Right click on the page to view context menu. From the FireShot option select Capture visible area and... and then choose Edit.
3. The entire page opens in a new FireShot window.
4. Select the desired portion of the image and click on the Crop button on the right toolbar.
5. Select the Text tool in the top toolbar and click on the image where you want to write the note

Also see: Free tools to generate screenshots