The Design Office has released their icon font Modern Pictograms into the wild via FontSquirrel. It's free and open to use in your work and, frankly, looks simple and clean. No real surprises within but I like the forms a bit better than my current go to. via JXNBLK. The Developers Friend is a set of 400 icons output as both regular iPhone and Retina Display sizes. You can see every icon in the eight groups right here. It's a solid variety and seems worth the $25 price tag.