SoundToys
Used by 6 peoplesoundtoys.com ↗

“As far as plugins go, I have hundreds (thousands?) from years of NFR trades, but I usually only have installed Audio Damage (for obvious reasons), Valhalla DSP, Unfiltered Audio, Newfangled Audio, and SoundToys.”
Chris Randall Interview, Musician, co-founder of Audio Damage · via Uses This 
“But now I've got a bunch of more recent plugins like the SoundToys.”
Andrew W.K. Interview, Professional partyer · via Uses This