Sprite generation using Lemonade
We often use CSS sprites to make a web site render as fast as possible. This used to be a tedious process of cropping images, putting them in one giant image file and calculating (and remembering) the offset. Not any more! We recently discovered Lemonade, a gem that generates sprites automatically, does all the calculations and updates the CSS. Its usage is really simple: instead of "background-image" you just use "sprite-image" (with some additional, optional parameters) and Lemonade takes care of the rest. Highly recommended!