Citation manager - which one is your favourite?

[Health Navigator NZ]

Hi, 

Wonder what people's experience is with citation managers?
I've just started using Mendeley and it saved me so much time when adding references to a recent report. 

From my quick search, there are 5 well known ones - Endnote, Zotero, Mendeley, RefWorks and Papers. Each have their pros and cons, but so far Mendeley and Zotero are winning on my list as:

• both are free,
• can extract citations from PubMed,
• store pdfs,
• extract citation data from pdfs,
• good searching and
• enable groups for collaboration and sharing references. 

There are numerous blogs and articles comparing them and a useful table (though it is from Mendeley) here.

Tell us what your experiences have been.