Hidefromdock is quite self-explanatory. It hides the Application icon of an app from the Mac OS X Dock. (as long as the App hasn't been dragged into the dock to always be visible that is).
hidefromdock is free.
version 1.0 - June 2020. First release
Works with OSX 10.8 upwards. I have tested it under 10.8 up to 10.11. If you are running anything from 10.12 up to 10.15 and are feeling brave and want to give it a try, feel free.
If you have any suggestions, please get in touch via email. Many thanks.