https://www.adsrsounds.com/software/
https://www.bjoernbojahr.de/endlesswav.html
https://www.digitalbrain-instruments.com/
Standalone app to create a universal virtual MIDI keyboard.
Beta available on the GitHub repository.
https://www.meldaproduction.com/
https://www.tantalumaudio.com/
https://whiteelephantaudio.com/