Other referencing software
Reference management software help you organize your references and generate bibliographies in multiple citation formats. Here are some examples of free reference management software:
BibTeX
BibTeX is used to create references and bibliographies in LaTeX. BibTeX and LaTeX can be downloaded free of charge.
Mendeley
Mendeley is a web-based referencing programme, but also includes a social network for users. Mendeley is available free of charge.
Zotero
Zotero is a free plugin for Mozilla Firefox.