Fluent UI
A collection of UX frameworks for creating beautiful, cross-platform apps that share code, design, and interaction behavior.
UX Design Tools for 2018
How We Design (Windows Phone Dev Center)
Any platform. Your languages. Your tools. Develop solutions, on your terms, using Microsoft products and services.
Creating the Windows 8 user experience - Building Windows 8 - Site Home - MSDN Blogs
Get the latest information, insights, announcements, and news from Microsoft.
Designing UX for apps
Windows Desktop UI Concept
(The Verge Forums)