Zotero is a free citation management tool available as a Firefox Web
browser extension. Zotero allows you to easily collect, manage, and cite
bibliographic information from the Web pages, articles and other
documents that you view online. With Zotero, you can directly import
citations and articles from online library services including library
databases (journal articles, etc.). Zotero also works with Microsoft
Word, offering the ability to seamlessly transfer citations and
bibliographies to Word documents.