I made this same discovery a few months ago, and I decided on Mendeley myself. Many academics swear by it and I find it much more elegant and less clunky than

I made this same discovery a few months ago, and I decided on Mendeley myself. Many academics swear by it and I find it much more elegant and less clunky than Zotero. There's also Papers if you're looking to spend a bit of money, but as far as I can tell it's Mendeley plus a bad web browser.