Zotero is a free bibliographic software extension which works as an add-on in Firefox, Google Chrome, Opera, and Safari. Features include automatic capture of information from websites, formatted citation export, integration with Microsoft Word and LibreOffice.
The Zotero Support Webpages provide guidance on installation, adding things to your library, organising your library, creating bibliographies, and more. They also provide a whole page of screencast tutorials to watch.
