The following links include tables that compare the features of these citation tools.

Mendeley

A free citation management software program. Check out the LibGuide about Mendeley and find more detailed information on how to get the most out of this software.

Organize research, collaborate, and discover new knowledge [Mendeley]

Mendeley Desktop organizes your research paper collection and citations. It automatically extracts references from documents, generates bibliographies, and is freely available on Windows, Mac OS X and Linux.

Mendeley Web lets you access your research paper library from anywhere, share documents in closed groups, and collaborate on research projects online. It connects you to like-minded academics and puts the latest research trend statistics at your fingertips.

Zotero

A free citation management software plug in for Mozilla Firefox.  The following link is for the LibGuide about Zotero.