Visio GUI Bundle

Create wireframes, mockups and high fidelity prototypes for web, mobile and desktop apps using Microsoft Visio.
The Visio GUI Bundle includes 3,000+ royalty-free vector shapes, stencils and icons created from scratch in Visio, and can be edited and customized without needing additional tools.

It includes all UI Kits for iPhone, iPad, Android, BlackBerry, Facebook, Web/SaaS, Mac OS X, Windows Mobile, and Windows 8.
You can get this bundle in the following formats: OmniGraffle, Axure RP, Illustrator, Fireworks, Keynote, Visio or PowerPoint.
Or get the Super Bundle instead, which contains all 7 bundles for $197 instead of $441 ($244 off).