Zotero is a bibliographic management tool like Endnote or Ref Works, but it is freely available to download, install, and use. It was developed at George Mason University's Center for History and New Media with sponsorship from the Melon and Sloan Foundations and the Institute of Museum and Library Services. Zotero is a Firefox browser extension for Windows, Mac or Linux operating systems that allows users to efficiently collection information from library catalogs and databases and produce citations and bibliographies with ease. There is also the potential to store .pdf documents, notes, and snapshots of web pages. A final feature of Zotero is creation of group libraries for collaborative projects. This guide will help with installation, basic use, and support materials for using Zotero.