GUI Elements & Tools
- iOS 7 GUI PSD by Teehan+Lax
- iPad GUI PSD by Teehan+Lax
- Windows Phone GUI PSD
- Windows Phone Design Downloads
- Android Design Downloads (Holo)
- Android DPI Calculator — good tool to calculate multiple graphics sizes for different densities
Reference & Inspiration
- iOSiOS The operating system used on iPhones and iPads.: Apple’s Human Interface Guidelines (reference)
- iOS: Pttrns: a collection of user interface solution screenshots (inspiration, reference)
- iOS & Android: Mobile-Patterns: same as above with a slightly different selection (inspiration, reference)
- Windows Phone: Windows Phone App Screenshots (inspiration)
- Android: Google’s Android Guidelines for Holo (reference)
- Android: Supporting multiple screen sizes and densities (reference)
- Android: Testing for multiple screen sizes (reference)
- iOS & Android: Visual design cheat sheet (reference)
- Windows Phone: Windows Phone Design Library (reference)
- Windows Phone: Windows Phone Design Principles (reference)
Wireframing & Templates
- iPhone Mockup — quick and super simple iPhone UIUI UI is an acronym for User Interface – the layout of the page the user interacts with. Think ‘how are they doing that’ and less about what they are doing. sketching
- Balsamiq — good all around mockup tool, paid with free web demo
- Mockup Builder — Balsamiq alternative
- Kick-ass mobile wireframing with Moqups
- 20 mobile friendly wireframing tools by Mashable
- 10 general-purpose wireframing tools by Mashable
- Wireframe templates for Keynote, iOS + Android + Windows Phone (paid)
- iPhone Wireframe Templates (print-out stencil)
- iPad Wireframe Templates (print-out stencil)
- Android Wireframe templates, older devices (print-out stencil)
- More Android Wireframe templates
- Tons of Android wireframing resources
Device Mockups
- iOS: iPhone 5 (retina)
- iOS: iPad (retina)
- Android: Samsung Galaxy S3
- Windows Phone: Nokia Lumia 920
App prototyping tools
- PrototypesApp (paid)
- Fluid UI (paid)
- Mockabilly (paid)