Any macOS users should check out DevonThink.
My use case: before Google+ folded I saved all my history there, because 99% of this was links to pages on stuff I found interesting/fun/relevant.
So now I have a large amount of urls (some will probably be defunct by now but it is not relevant). What I would like to do is to feed these urls to something (DevonThink?) that could access the article, and index it so that if - as an example - I want to prepare a RPG campaign on modern day pirates I can just write in the search box ["pirates" "shipping" "modern"] and hopefully get a list of web articles that are relevant.
Now, I know that Devon has some sort of automatic indexing/clustering facility for documents you have on your HD, but it is not really clear to me if it works also with stuff you only have an URL to.
(If anyone has some alternatives to suggest I will be very interested - I toyed with the idea of putting together an ElasticSearch VM for this but it remained on the backburner for years).
Here is my original request here, btw: https://news.ycombinator.com/item?id=18882167