A free citation and bibliographic manager.
Extensions for Chrome and Firefox allow you to easily save and organize citations for sources you find online, including books, articles, films, web pages, and more. Note that the Safari extension is no longer supported with Safari Version 12. With Zotero you can:

1. Store references in one place
2. Keep reading notes linked to sources
3. Download citations directly from databases
4. Automatically format bibliographies and citations
in MLA, APA, Chicago Manual of Style, and many
other styles using Microsoft Word and Open Office
5. Share your collections with collaborators
6. Access your Zotero library from any location and
remotely back up and sync your library