The Caracol one handed keyboard concept is a computer keyboard that absolutely throws convention to the wind and takes a new approach to simplify typing. You can type fast with one hand. Caracol uses a rotary keyboard on a wheel through which you slip your palm.
The keywheel rests on a nice ergonomic pad. The loop has a 5:1 gearbox which enables it to rotate even with a small movement of the palm. So, you can access all the keys quickly and type almost without thought as you find the keys automatically falling to your fingers, rather then your fingers seeking them. It’s a concept for now, but this one looks like it has real promise.