Please find few useful links for developing Windows Universal Applications in Windows 10.
Windows 10 and new developer tools provide the tools, features, and experiences powered by the new Universal Windows Platform.
Build Windows apps now. Windows 10 makes it easier than ever to develop apps for the Universal Windows Platform with just one API set and one app package to reach all Windows 10 devices – PCs, tablets, phones, and more.
Here’s the training you need to create Universal Windows Platform (UWP) apps for Windows 10. A UWP app can run on any Windows-based device, including phones, tablets, and PCs. If you’re looking for docs for older Windows app types and previous versions of Windows, you’ll find them here, too.
The new unified Windows Dev Center dashboard lets you publish and manage all of your apps for Windows devices