If you're a developer who enjoys spending time coding more than working on design, you may want to check out a new iOS 7 icon glyph set called Essence. The icon set includes 300 icons covering all categories including productivity, lifestyle, weather and food. In addition to the 300 standard icons, Essence also includes a set of matching filled "selected" versions of the icons.
Essence is normally US$29.99, but can be purchased now for only $19.99. If you buy the set now, you'll also get additional icons as they are added in the upcoming months. Developers will be happy to hear that Essence is attribution-free for an unlimited number of projects.