ViewFolderSize Pro   
by Moveax, LLC   

ViewFolderSize Pro is the slim add-on utility for the Windows platforms.
This highly configurable application enables you to view total file and folder size details right from Windows Explorer without having to switch to another application.
And its unbeatable combination of high speed performance, real-time size information updating and flexible customization options for displaying information make ViewFolderSize Pro stand out of other competing software.
MAIN FEATURES:
* High speed real-time performance.
* Integration with Windows Explorer.
* Native x64 architecture support.
* Customization flexibility.
* Data visualization.
* Advanced sorting.
* Convenient interface.