I made good experiences with Zotero. Works well with LaTeX, a browser-plugin allows to add papers directly and you can annotate downloaded PDFs. Only problem I had were the paper-metadata, which often needed some fixing. Also that you cannot host your own server is a slight disadvantage.

This is for memes about science, not political agendas. Spread your anger elsewhere, or better, keep it for yourself.

Actually, they reference him.

Sind wir nicht noch in der Testphase?