Pop Flat Button is a small iOS button designed in 2 different styles. It has 9 button types and it can be animated across those.
UI animation: Minimal Search Bar w/ Select by Hans Engebretsen
Take a look at this Set Of Free Construction Icons For iOS They has been meticulously designed on a pixel grid at 2 sizes for tab bars and toolbars
Fashion Autopsy: The Glorious Fashion Illustrations of René Gruau