Keyb 1.3
Type with one hand, no special hardware required! I wrote Keyb while holding my sleeping daughter in one hand. It’s also great for permanent and temporary disabilities, or tasks where you want to keep one hand on the mouse, like gaming or spreadsheets.
How does it work? Simply hold down the spacebar, and the left and right half of your keyboard magically swap places. The two halves are mirrored, so if you would normally type a letter with your left middle finger, use your right middle finger. The same is true in the other direction. If you can already touch-type, you’ll be surprised how quickly your brain gets used to it!
It’s free on the Mac App Store.