Laserbrew NKS version
The classic Reaktor reverb, NKSified
Another oldie but goodie (circa 2003) made NKS compatible for realtime use in Maschine and Komplete Kontrol. There may be plenty of other reverbs out there but I still come back to Laserbrew, it's still one of a kind, as highlighted recently here https://blog.native-instruments.com/10-secret-weapons-for-film-scoring-from-the-reaktor-user-library/. It's an FX reverb, not intended for 'realistic' spaces but for creatively messing with the sonic environment. All credit to the designer of this classic, Tim Schwerdtfeger, I just tweaked it a little to make it compatible with NKS and added an NKS template to the ensemble and all snaps. Includes a browser thumbnail image.