HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
GNU Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
PageNest - PageNest comes with the ability to download up to two score files simultaneously, making the best possible use of your network connection.
Web ScrapBook - A browser extension that captures the web page faithfully with highly customizable configurations.