13 March 2014
Sprite Cow is another one which is open source and works very effective by auto-recognizing the different elements inside a single image.
So, you design the sprite image in your favorite imaged editing application, upload it to Sprite Cow and simply click (or click + drag) on each element to get their width, height and background-position as a CSS rule.
Homepage: http://www.spritecow.com
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