Zotero is a free, easy-to-use tool to help you collect, organize, cite, share, and analyze your research sources. It lives right where you do your work—in the web browser itself.
Zotero Standalone - runs as a separate application and plugs into your choice of browser
Zotero for Firefox - lets you capture and organize all your research without ever leaving the browser.
Zotero Support & Documentation
Create a Zotero Account - allows you to sync your library, participate in groups, or post to the support forums.
Zotero Bookmarklet - The Zotero Bookmarklet is a bookmark you add to your browser to save the page you are reading to your Zotero library.