Sprite Cow is a visual tool for generating CSS background sprites. Okay, cool! But what is a sprite? I knew those old school designers (still slicing their large images) would ask this question. A sprite is a big block of small images that loads in to the Web browser once and might be used to displays many different images at once or different states of a single image on events like mouse over. The reason is simple – a sprite loads just once and thus sends only one HTTP request opposite to old school sliced images each sending one HTTP request separately.
This CSS background sprites generator saves a lot of designer’s time that get wasted when they copy all the positions and sizes from graphics applications.
It’s nice reading about Sprite Cow