I compiled a list of free audio plug-ins that actually work in Premiere

http://www.fallenempiredigital.com/blog/2013/03/06/enhance-your-audio- mix-in-premiere-pro-with-free-vst-audio-effect-plug-ins/

Cross posted from the Creative Cow forums, I wanted to invite others to suggest plugins they may be using (free preferred). And no, Adobe, I'm not dissing your audio effects in Premiere but they are Soviet-prison-cheese-sandwhich basic.