HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
GMX File Storage - The GMX File Storage Manager allows your PC and your GMX File Storage to exchange data via the...
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
Cloudu - Secure German online storage and file sync service. Apps for all major platforms.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Yandex.Disk - Files on Yandex.Disk won't get lost if your phone or computer breaks.