"The originators of this are https://mokibo.com I first saw this at CES a number of years ago. It's a great concept and also a perfect option for VR standalone use, mobile and tablets. A great special use case is with industrial/simulators because you don't have to have a mouse to fumble for and the keyboard is already in place (No I'm not a part of their group, just a fan)."

"https://www.bottomsupbeer.com/  "