Zotero is a free and open-source reference management software to manage bibliographic data and related research materials. Zotero users can generate citations and bibliographies through word processor plugins, or directly in Zotero, using Citation Style Language styles. The house styles of most academic journals are available in Zotero, and the bibliography can be reformatted with a few clicks. Zotero also allows users to create their own customized citation styles.
Zotero can import and export citations from or to many formats, including Wikipedia Citation Templates, BibTeX, BibLateX, RefWorks, MODS, COinS, Citation Style Language/JSON, refer/BibIX, RIS, TEI, several flavours of RDF, Evernote, and EndNote.
Zotero can associate notes with bibliographic items. It can annotate PDFs and synchronize them with a mobile PDF reader through the Zotfile plugin.