This is a 3D printable case for a mechanical keyboard. The companion github repository contains a matching PCB design and settings for the firmware builder.
The design it quite … let's say elaborate. You will see the bottom shell contains a large number of studs. Each of these studs is located underneath the center of a key switch, leaving a little bit of room between them. This lets you stick a small piece of damping material on top of each stud which will press against the bottom of their respective switches, with the idea that this will dramatically reduce vibrations when typing.
The author marked this model as their own original creation.