Zotero is an application that allows a researcher to create, organize and import references. You can cooperate with others, cite while you write, automatically format references in specific bibliographic styles, and create bibliographies.
It's easy to use, connects with your web browser to download sources, and best of all it's free.
Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.
It automatically updates itself periodically to work with new online sources and new bibliographic styles.
You may download Zotero for Firefox, or Zotero Standalone.
Choose Zotero for Firefox if:
You use the Firefox browser
You prefer to have Zotero as a pane inside your browser instead of a separate window
Zotero for Firefox runs as a plugin for the Firefox web browser, not as a separate program.
The same version of Zotero for Firefox works on any computer that runs Firefox; there are no separate Windows and Mac versions.
Word processor plugins allow you to insert citations and bibliographies directly into your documents. Installing them is optional but highly recommended.