This is a leg for raising monitors up high enough that a mouse/keyboard can be stored and used underneath the monitors. In the past I have built unattractive wooden versions of this, but I figured I'd add a little flair.

The shelf is made from a stair step I got from Home Depot. I was too lazy to put a finish on it, but it would conceivably look quite good with a coat of finish.

The general shape was made with the Loft tool in FreeCad.

Enjoy!