audiotuts has compiled a list of 15 reverb plugins, all of which are totally free!
There is a good mixture of both windows and mac so there should be something for everyone.
Reverb is an effect that you’ll find in any mix, and you can never have enough options when it comes to crafting the right reverberation for the sound. That’s why I’ve scoured the web to come up with this list of completely free plug-ins you can try.
Some will say you can never get the same quality reverb with a free plug-in and others will say it doesn’t really matter, but at the end of the day it comes down to your taste and what sounds good in your mix. So, download a bunch and try them out!