Citation tools allow you to save and organize your research. They also let you create formatted bibliographies.
A personal citation library designed to directly import references from multiple databases. In Refworks you can organize and manage your citations, share them with colleagues, and format bibliographies.
Downloadable as a standalone program or a Firefox extension, Zotero is designed to store content in any format, including PDFs, images, audio
Downloadable as a standalone program from OIT, EndNote is a powerful citation tool for organizing your research and creating formatted citations. In addition to the standalone option, you can create an EndNote Web account.