Tabs Studio is a Visual Studio and SSMS extension empowering you to work comfortably with any number of open documents.
By default Tabs Studio groups together in an extended tab corresponding C++ source and header files, WPF markup and code-behind, ASP UI and code-behind, form code and designer, WCF service and code, and other open documents that differ only in the extension. It saves screen space, lets you quickly switch between corresponding files and conveniently organizes tabs:
https://tabsstudio.com/
Making Visual Studio perfect 