A great collection for iOS8 keyboard mockup in Photoshop (PSD) format, created by Virgil Pana on Dribbble. You can only use these PSD mockups for personal use only.
If you ever need a web element that is somehow influenced by iOS7 interface, you might want to consider using this UI Kit that have iOS7 look and feel.
A gorgeous radio app design for iOS 7. Really love the color composition on the design.