HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Mux - Video performance analytics for online media and developers
GNU Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
Vidooly - Get deeper analytics of any YouTube channel or video
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Kuku Analytics - Smart social media analytics