This is really a great idea. As an iOS developer I'd find it more useful to have PDF or PNG files instead of PSD. Or even better, Opacity (see http://likethought.com/opacity/) project files so I could build factories as needed.
These look great! I'd really like to see more designers improve on some stock elements in iOS and release the results.
I plan to work on free resources for improved UIButtons, grouped table views, and other elements of UIKit in need of improvement.
You are right. And that is why I want give developers lot of designe elements to use for their apps. Price is starting from 1$. I hope its will really help ios developers