Faderfox produces awesome MIDI controllers. Already two years ago I programmed a software editor for the PC4 potentiometer controller. Now the new EC4 Controller was released. Featuring 16 freely configurable rotary encoders for handling up to 4096 parameters and an OLED display for values and labels. And, guess what, I made an editor for this one, too. The editors run with Web-MIDI in Chromium web browsers. They are open source and the software is available on GitHub.