
While the native screenshot applications found in most Linux distributions are fine for quick screengrabs, you need something heftier if you plan to highlight, annotate, resize or otherwise tinker with images. Shutter is a great little open source app that lets you take quick snapshots of your computer screen and dress them up all sorts of ways.
Use Shutter to take a timed or instant screenshot of your entire desktop, a single window, or a particular area of your screen. You can even dispatch it onto the Internet to take a snapshot of a Web site and bring you back the results.