Citations, Footnotes, and Bibliographies, oh my

There are so many tools now to help us with citing references properly. In no particular order, but ready for click and learn, we’ve got:
RefWorks http://www.refworks.com/
EndNote http://www.endnote.com/
ProCite http://www.procite.com/
BibDesk http://bibdesk.sf.net
Biblioscape http://www.biblioscape.com/biblioexpress.htm
Biblioexpress 3 http://www.biblioscape.com/biblioexpress.htm
Noodle Tools NoodleBib Express http://noodletools.com/login.php
Wikindx3 http://wikindx.sourceforge.net/index2.html
Zotero http://www.zotero.org/
Connotea http://www.connotea.org/
CiteULike http://www.citeulike.org/
KnightCite http://webapps.calvin.edu/knightcite/
EasyBib http://easybib.com
KBibTeX http://www.unix-ag.uni-kl.de/~fischer/kbibtex/
BibUs http://bibus-biblio.sourceforge.net/
Evernote http://www.evernote.com/en/downloads
Refbase http://refbase.sourceforge.net/
JabRef http://jabref.sf.net
OttoBib http://www.ottobib.com
The Citation Machine and Son of Citation Machine http://citationmachine.net
Sente http://www.thirdstreetsoftware.com/
SourceAid http://www.sourceaid.com/
Hot Reference http://www.hotreference.com/
Aigaion http://www.aigaion.nl/index.php?page=features
SimplyBibTeX http://www.technotecture.com/?node=projects/simplybibtex/main
Jorge http://sourceforge.net/projects/jorge
I am certain there are plenty more! Besides the top three comprehensive services, I am seeing a surge in the popularity of Zotero and Noodle Tools. What are you seeing?
Many have dozens of ways to cite – MLA, APA, Turabian, Scientific Notation, Chicago, and more – horrors for the student thesis and dissertation writer.
Most are free but the paid services seem more complete in the AR/OC area. Some are open source, Mac, Linux, and more variations on a theme. Some just sit inside your browser as a quick tool.
It seems there a few excuses not to cite properly any more. Plagiarists beware. Some even capture web page citations on the fly! I can’t believe I did this the hard way (tracking down references after the paper was written (grin/groan))
Stephen