DownThemAll lets you download all the links or images on a website and much more: you can refine your downloads by fully customizable filters to get only what you really want.
Comes in really handy sometimes. (For Firefox / Chrome / Edge)
Another is uBlacklist, which allows you to blacklist domains from Google / Bing / DDG search results (like say, pinterest.*), also for Firefox / Chrome / Edge.
Mostly if I find an open directory with stuff I like. Also it has come in handy downloading maps from government websites. It's more of a "handy to have" than "day to day use"