At Build, Microsoft demoed a tool dubbed Project Centennial that lets developers convert desktop (Win32) apps to the UWP (AppX) platform, making it convenient to publish traditional apps to the Windows Store. Microsoft has now made the tool available for download in preview to those running build 14316 or newer.

From Microsoft:

Desktop App Converter allows developers to bring their desktop apps to UWP. It converts a desktop Windows installer such as MSI or exe to an AppX package that can be deployed to a Windows 10 desktop. The software may collect information about you and your use of the software and send that to Microsoft.

Apps ported using Project Centennial will be able to leverage the functionality of the Universal Windows API, including Live Tiles, Cortana integration, Action Center, and more. The utility is Microsoft's latest bid to make it easier for developers to push content to the Windows Store, with the vendor also working on porting iOS apps through Project Islandwood.

Download Desktop App Converter Preview

Thanks Tony for the tip!