Zotero [zoh-TAIR-oh] is a free, easy-to-use tool to help you collect,
organize, cite, and share your research sources.

Zotero is the only research tool that automatically senses content in
your web browser, allowing you to add it to your personal library with
a single click. Whether you're searching for a preprint on arXiv.org,
a journal article from JSTOR, a news story from the New York Times, or
a book from your university library catalog, Zotero has you covered
with support for thousands of sites.

Zotero collects all your research in a single, searchable interface.
You can add PDFs, images, audio / 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 are
looking for with just a few keystrokes.