Hi all.

I present here my own keyboard firmware / controller code.
Running on Teensy 3.1 or 3.2 with ST7735 (160x128 color LCD) and any matrix keyboard (for PC USB).

Project description on my website, with information about features and use cases (why I needed it, etc.).

Additionally: gallery with pictures and videos (no voice though).

Sources here, with info on used libraries.

K.C. allows changing any key mappings (on layers) or editing sequences on display, in real-time.
It also features few fullscreen demos like Plasma, some 3D polyhedrons etc. There is a game on it too.

The keyboards aren't made by me, just quite modified. They have reduced (cut off) rubber domes, making them much softer and nicer to use.