A web-based citation manager that allows you to store and manage your references, helps you to format citations, and generates bibliographies that can be inserted into your documents. See this guidefor getting started with RefWorks.
A free Firefox extension that helps you collect, manage, and cite your research sources. It can only be used with the Firefox internet browser. It extracts bibliographic information from websites, library catalogs, and databases, allowing you to save, organize, and create bibliographies from your citations. See here for more information.