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.
Web ScrapBook - A browser extension that captures the web page faithfully with highly customizable configurations.
cURL - cURL is a computer software project providing a library and command-line tool for transferring data...
Cyotek WebCopy - Cyotek WebCopy is a free program for copying either full or partial website and save it to your local PC in order to view it in offline mode later on.