gallery-dl
Download image galleries and collections from several image hosting sites.
TLDR
Download images from the specified URL
$ gallery-dl "[url]"
Get the direct URL of an image from a site supporting authentication with username and password
$ gallery-dl --get-urls --username [username] --password [password] "[url]"
Filter manga chapters by chapter number and language
$ gallery-dl --chapter-filter "[10 <= chapter < 20]" --option "lang=[language_code]" "[url]