I would like to know how to create UI like those used by Visual Studio, Office 2013, GitHub for Windows, etc.
I searched the internet and found a theme for WPF called Cosmopolitan Theme, but looking at some details you realize that it is not the same, and I think because it was a third-party project, Microsoft would not have used it to do the VS2012 / VS2013 and Office 2013.
To show the difference, I took screenshots of these programs:
Interface I want to build:
GitHub for Windows:
The difference between these programs is in the style of their user interfaces. I have already looked for if there is a template in Visual Studio Express for Windows 8, Visual Studio Express for Windows Desktop, Visual Studio Ultimate 2012 and Ultimate 2013, but apparently there is no such template.
Apparently these UIs are a WPF customization, but I can not find anything official about it.
What is the name of this "theme"? Can anyone use it or is it paid? Is it something like the Ribbon that was first used (I think) in Office 2007?