Acustica Audio makes mostly EQ and compressor plugins that emulate classic and/or rare analog gear by sampling, rather than traditional "algorithmic" programming. There is a new one out today that is free until Valentine's Day:
http://acustica-audio.com/pages/specials/acustica-audio-ceilI have and greatly enjoy a number of their plugins, though I haven't had a chance to experiment much with this one yet.