OpenOffice.org Bibliographic (OOoBib)
First, a disclaimer: This software doesn't exist yet. But, I've included it here just to generate a little excitement for what could be a great addition to OpenOffice.org.
Pros: According to the project website, this will greatly augment the bibliographic features for OOo Writer. We'll have to see what this entails in the long run.
Cons: Microsoft Office users are probably out of luck here. Switch to OpenOffice.org if you want to give it a spin! And the biggest current downside: this program isn't functional yet.
The Bottom Line: Look for this to appear sometime in the second half of 2008.