Two more great ones:
Bionic Delay (my favourite delay plugin):
http://www.interruptor.ch/vst_overview.shtml
Stormgate1 (awesome for audio modulation, sidechain effects .etc):
http://www.araldfx.com/downloads.php
And another cool freebie application for audio stuff that you might not know of is Audiomove. This is a VERY high quality sample rate converter.
https://public.msli.com/lcs/audiomove/index.html