As part of Waves Cyber Monday sale, Waves released H-Comp for Free.
H-Comp combines the modeled behavior of transformers, tubes, and transistors, together with the power and precision that only a plugin can provide. The result is a compressor with capabilities that engineers could only dream about back in the day. H-Comp lends a whole new meaning to the concept of THD: Total Harmonic Distinction.
More info and download here: Waves | H-Comp plugin for Free