Work with Image Sprites? Generate CSS with SpriteCow

SpriteCow is a nifty tool that generates CSS for your image sprites. Upload a sprite, click on the desired region and — like magic — SpriteCow will generate a CSS snippet containing the background position, width, and height for that region.

At the time of this writing, SpriteCow only works in Chrome, Firefox, Opera, and IE10 (Safari is not supported).