Universal Apps: Starting an exploration
The Template samples:
https://code.msdn.microsoft.com/wpapps/Universal-Windows-app-cb3248c3
To use the templates you must be running Windows 8.1 and upgrade your Visual Studio 2013 to:
Now your file new project dialog will look like the following, you will see that there is a new category called Universal Apps, and four templates.
End of the beginning of the universal app exploration.