It is a free reference manager and academic social network. Make your own fully-searchable library in seconds, cite as you write, and read and annotate your PDFs on any device.

Completely free, online basic reference manager – perfect for writing that first research paper

Zotero is a veteran and completely free browser based plugin that helps you collect, organize, cite, and share your research sources. This tool lives right where you do your work; in the web browser itself. Whether you need to create footnotes, endnotes, in-text citations, or bibliographies, Zotero will do all the dirty work for you, leaving you free to focus on your writing

RefWorks is an online citation manager. One can use it to create an online list of references from your searches, to insert or paste citations into a document and to insert or produce a bibliography in a selection of styles

It helps to create your citations, reference lists and bibliographies automatically using the APA, MLA, Chicago, or Harvard referencing styles at the click of button. Simply browse to the page you wish to cite and click the button to generate a correctly formatted citation.

Helps to create your bibliography over 7,500 reference styles, including Harvard, APA and MLA, etc

A great citation generator, EasyBib compiles your bibliographies and citations for you, saving you valuable time.

Cite your work at APA, MLA, and Chicago without leaving the homepage in 3 easy steps. The fourth step allows you to download your bibliography; you can even save it if you create an account.

A great citation generator, EasyBib compiles your bibliographies and citations for you, saving you valuable time.

An open source reference manager that is available for Windows, Mac, and Linux, and offers PDF metadata retrieval, free online backup of your mind maps, a monitoring function for new files (PDFs, images, etc.), and an MS-Word add on. Oh, and it also allows you to have full control over your data (no registration required).