From the CADD Microsystems website:
There’s a lot more information in your Revit and AutoCAD files, and sometimes you don’t want to open them up to find it. The standard Windows file properties dialog box is pretty lacking, but FilePROPS lets you peek under the hood of your RVT and DWG files to get a little more crucial data.
Built Into Windows
Works right in Windows – even on machines that don’t have AutoCAD or Revit
Just right-click on the file and select File…