Academy Dashboard › Forum › Studio › Free Resources › Free Plug-ins › Dynamic Range Meter (Win/Mac) : Offline / Plugin
Kind "old" but great site: http://www.dynamicrange.de/
Windows: http://www.dynamicrange.de/es/es/download
Mac (offline only): http://www.dynamicrange.de/sites/default/files/DR-Offline-Meter-for-MAC.zip