HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Pocket - When you find something you want to view later, put it in Pocket.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
GNU Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
wallabag - Save the web, freely.