This is an old revision of the document!
The venerable youtube-dl. (supported sites)
Always try this first, then look around for alternatives.
Make sure you're up to date though! youtube-dl -U
Analoguous to youtube-dl
, there's gallery-dl (supported sites)
For all zoomable images (Google Arts & Culture, hi-res scans, etc.): https://dezoomify.ophir.dev/dezoomify/dezoomify.html (also has a standalone version)