I don't know if anyone needs these, but I'll drop them here anyway.
Zotero
https://www.zotero.org/
Improved PDF retrieval with Unpaywall integration
https://www.zotero.org/blog/improved-pdf-retrieval-with-unpaywall-integration/
How to configure Zotero to retrieve Publication’s PDF from Sci-Hub automatically
https://gagarine.medium.com/use-sci-hub-with-zotero-as-a-fall-back-pdf-resolver-cf139eb2cea7