'T-De-Esser Plus' free VST

Available for Mac & PC, 32 & 64 bit …
https://techivation.com/t-de-esser-plus/

I can testify it works in 32-bit Audacity …
T-De-Esser Plus in Audcaity (32-bit) on Windows 8.gif
“intensity” = compression-ratio, “sharpness” = knee, “diff” = delta.