This is a great collection of GUI’s, mock-ups, UI and design elements with PSD source files, skeuomorphic interface samples for all app designers. Make sure you bookmark this in your favorites.
Twitter App UI for iPhone 5 (PSD)
Polaris UI Kit: Free PSD
Passbook UI PSD from iOS6: Free PSD
iPad Application Mockup (PSD)
Minimal Light User Interface Freebie
Notepad App PSD Template
Flat UI Kit (PSD)
iPhone iOS 6 GUI PSD: Free PSD
App View Mobile UI: Free PSD
Vita iPhone App UI Kit PSD
Free 3D PSD UI Kit
Free Ipad App Design – Email Client
iPhone App Retina
Tooltip iOS App UI PSD
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