Keyboard Diagrams
Piano Keyboard Diagramming.
https://github.com/pearcec/keyboardDiagrams/archive/refs/tags/1.0.0.zip
Credit : https://musescore.org/en/project/piano-keyboard-diagram for initial work. Couldn't get it to work, so I refactored the code and updated it to github so others can contribute.
API compatibility
3.x
4.x
Plugin categories
Chord symbols
Code repository