I wish to know pages that are helpful in any way, to make research papers easier to find and obtain and so on.

Basically, anything that you find useful that's in the ballpark of "useful" and "published research"

So far I got the basic:

Obtain:
>Sci-hub
>Library Genesis
>weirdly enough, scribd

Search:
>Crossref
>LibGen science articles search
>Google scholar

Any other sites or anything that I should add to my list that you losers use which you find useful?