I mentioned in another list Aalto CM, made by Madrona Labs.  Apparently they also offer a similar version as a freebie outside of buying Computer Music Magazine. The only catch is you have to register on the site beatdrive which is easy and free except for the fact that the site is in German:
 
http://www.beatdrive.de/?t=plugins&id=4
 
google translate seems to do a decent job
 
http://translate.google.com/translate?sl=de&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.beatdrive.de%2F%3Ft%3Dplugins%26id%3D4
 
probably aimed more at the experimental musiican and sound designer but one of the more interesting free synths I have come across