"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."
There is a Grace Research Guide available to help you use Zotero. http://libguides.grace.edu/zotero