Zotero collects all your research in a single, searchable interface. You can add PDFs, images, audio and video files, snapshots of web pages, and really anything else. Zotero automatically indexes the full-text content of your library, enabling you to find exactly what you’re looking for with just a few keystrokes.
I’ve used Diigo for years. Changes in the Diigo interface just aren’t working for me so I’m ready to try some alternatives.
This tool was recommended to me by one of my graduate students. I’m going to give it a go. If any of you have tried this, let me know?