QTTabBar is a Shell-Extension to add Tab functionality to Windows Explorer - folder window.
Besides, QTTabBar provides various features that certainly help you deal with files and folders.

What can it do?

Most of the functionalities are activated when you enable the toolbars offered by QTTabBar in a folder window.

Tab Bar realizes ... the tabbed browsing of folders. Command Bars offer various command buttons including ones added by Plug-Ins. Extra Views show extra folder view in a folder window.