vst reverbs?

One free one that seems to have gotten some good reviews is MVerb by Martin Eastwood.

http://martineastwood.com/wordpress/?p=169

mverb.png


you can read some commentary about it in this KVR thread:

http://www.kvraudio.com/forum/viewtopic.php?t=287108&postdays=0&postorder=asc&start=0

Never tried it myself, but remembered the thread and since you mentioned free it might be worth giving a shot.