iDock Icons
Instantly preview icon designs in the dock on Mac OS X with iDock Icons. If you’re a designer or Mac developer this tool will save you tons of time. To use iDock Icons, simply drag and drop your images onto the window and you can instantly see how they look in the dock. Effortlessly switch between multiple icon images by clicking with your mouse or use the arrow keys on your keyboard.
You don’t have to waste time preparing different Asset Catalogs or .iconset folders to view your icons in the dock. You don’t have to relaunch your app in Xcode a thousand times to see which one of your icon design looks the best. Use iDock icons and see how they look in the dock instantly.

Features
-Instantly preview icons in the dock on your Mac.
-Supports .PNG, .AI, .JPG, .PSD, .GIF, .ICNS, and many more file types.