Its claim to fame is basically that it will tame the “s” sounds in your vocal tracks while preserving an authentic, clear sound. Your main controls are intensity, max de-ess, and frequency. Honestly, it just looks like a box with some sliders (which is kind of what it is). Creator Chris (last name unknown) himself calls this VST a high-performance “secret weapon.” Kicking off this list is Airwindows’ DeEss, which some consider one of the best free options available, but for some reason is a bit of a hidden gem.