This is the dactyl-manform-r-track, a keyboard with integrated trackball and features you usually don't have on either of them (enabled through the firmware [QMK])
I it's very nice to use FreeCAD with it. Typing numbers, clicking Gui, turning, zooming etc.
It's not a pure FreeCAD project and from project design perspective not optimal since it carries on a lot of historic cruft with it.
The manuform keyboard was a FreeCAD project. The dactyl project uses closure to generate openscad code. The dactyl-manuform is like the dactyl.
I use FreeCAD to add my last changes (mainly the track ball socket).
It would be nice if FreeCAD would be more attractive to coders so its used in the first place instead of this closure - openscad mix.
I described the project here:
https://www.reddit.com/r/MechanicalKeyb ... ures_on_a/