Free Download Manager - It is a powerful modern download accelerator and organizer for Windows and Mac.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Folx GO + - Folx GO + is one of the best download managers for macOS.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Internet Download Manager - Internet Download Manager is an application that is designed to make downloading, organizing and storing your files a whole lot easier. If you are like many people, you might download a lot of files from the internet on a daily basis.
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.