https://www.uvi.net/relayer.html
Just a word of warning - this is blacklisted in Cubase 9. It seems to be working OK manually enabled. CPU use varies depending on what is used - not sure if it's improved but it doesn't seem as extreme as I remember. Some rather nice reverbs in there now.New Features:
* Diffusion
Use the delay as a reverb and produce a dense delay tail, aerial sounds and lush atmosphere
* Ducker
Create more intelligible delayed tracks or classic sidechain pumping effects
* Mix parameter in Redux FX
* Phasor in FX with Frequency, Order, Feedback, Spread and Depth parameters
Dozens of additional presets including Studio Essentials by MixbusTV
New IRs in the Color section
It's on offer for 79 Euros at the moment.