Wget
Open Source
Wget is a free utility for non-interactive download of files from the Web.
WebCopy
Free
WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Teleport Pro
Commercial
Teleport Pro is an offline browsing webspider.
ScrapBook
Open Source
ScrapBook is an extension for the Mozilla Firefox web browser which adds enhanced scrapbooking, page saving, bookmarking, and notetaking functionality.
Offline Explorer
Commercial
MetaProducts Offline Explorer is a Windows XP/Vista/7/8/10 program that allows you to download an unlimited number of your favorite Web and FTP sites.
SiteSucker
Commercial
SiteSucker helps you download websites to your computer.
Compare HTTrack with alternatives
Compare Offline Explorer and HTTrack and decide which is most suitable for you.
Compare Teleport Pro and HTTrack and decide which is most suitable for you.