Abduction! – Directed more at showing people errors in webpages or helping with development, Abduction will save all or a portion of a page, or just a frame, as a GIF, JPG or PNG.
FireShot – An extremely handy screenshot extension that can shoot just the visible area of a page or capture the entire thing, no matter how long it is. Can be updated to a pro version that adds even more features such as an editor. Allows you to save to BMP, GIF, JPG or PNG.
Screengrab with Upload – A variation of the Screengrab extension in that you can automatically upload your screen captures to an online server to share them immediately.
