Zotero  Tags: zotero bibliographies software writing  

(This feature requires Zotero version 2.0, which at this writing is still in beta testing.  I've found it to work well so far, but use at your own risk and back up your library before you try it.)

Zotero's new Groups feature allows you to share references with other Zotero users online. It's a great way to work on collaborative research projects.

First, set up Zotero sync as described on this page.

Next, log in at Zotero.org. There's a "Log In" link in the top right corner of the page.

You can search for existing public groups or create a new group. Groups may be public (searchable, and anyone can join) or private (users can only join if invited).

You'll now have two sections in your Zotero collections pane: My Library and Group Libraries. You can drag items back and forth between them at will.