Zotero
Zotero is free and open-source reference management software to manage bibliographic data and related research materials (such as PDF files). Notable features include web browser integration, online syncing, generation of in-text citations, footnotes and bibliographies, as well as integration with the word processors Microsoft Word, LibreOffice, OpenOffice.org Writer and NeoOffice. It is produced by the Center for History and New Media of George Mason University (GMU).
Etymology
The name 'Zotero' is loosely derived from an Albanian verb meaning "to master".
Features
Zotero shows an icon when a resource (book, article, thesis) is being viewed on many websites (such as library catalogs, PubMed, Google Scholar, Google Books, Amazon.com, Wikipedia, and publisher's websites). Clicking this icon saves the full reference information to the Zotero library. Zotero can also save a copy of the webpage, or, in the case of academic articles, a copy of the full text PDF. Users can then add notes, tags, attachments, and their own metadata.