What is the general name for these articles which feature lists?
Well, recently the internet has been taken by storm by articles such as: "20 Ways To Subtly...", "5 Things to Watch...", "15 things only a Pakistani..." etc,.
So, what do you call such features?
Listicle 'an article structured in the form of a list, typically having some additional content relating to each item'
The word is of relatively recent coinage and is a portmanteau from 'list' and 'article'.
(In my experience, usage is often slightly derogatory, but I have no cite for that.)