Mendeley is a free reference manager and academic social network that can help researchers organize their papers, citations, and bibliographies. It provides a private library to organize papers and notes, and also has public features that allow users to search over 100 million papers and collaborate with other researchers. Mendeley extracts metadata from papers on upload to populate the library. It integrates with Word and OpenOffice to allow easy citation and bibliography creation. Mendeley is supported by developers from major tech companies and is a useful alternative to expensive reference managers.