With iOS4’s recent release, you may be searching for UI elements to build your iPhone app, or use various elements in your designs. Here are two fantastic resources for you to download the UI elements, and they’re absolutely free.

iOS4 iPhone UI elements

iOS4 UI elements in PSD format

iOS4 (iPhone 4) GUI in PSD format – Teehan+Lax has released their latest PSD file with updated and accurate UI elements.

iPhone 3 OS UI elements in vector format – These elements are older, but since they’re in vector format, they’re much easier to work with.