IconBurglar

IconBurglar is the ultimate icon & resource extractor for Mac OS X. Use it to find all of the applications on your Mac, and browse through their inner 'guts', viewing images, icons, and even sound and music files.
Easily preview images and sounds, and view icons in full resolution.

(Don't worry, it's 100% safe for your apps!)IconBurglar's real beauty lies in its elegant, simple icon extraction interface. Find an app from its thorough search list, or just type its name. View the app's icon with full transparency, in any resolution, and save it out in a number of file formats or sizes with a single mouse click. (Just remember to respect any applicable copyrights!)
It's fun, easy, and safe for your apps, and gives you a behind-the-scenes look at some of your favorite Mac applications!