One-handed portable keyboards? (other than Twiddler)

Hi folks!

I already own several Twiddlers and am very familiar with its pros and cons.

I'm writing to see if anyone knows about alternatives. There seems to be no viable commercial one-handed portable keyboards besides Twiddler. I'm very interested in custom projects that anyone knows about.

Specifically, I'm looking to find something like the Twiddler but with a controller that is QMK compatible. My current project is bumping up against the limitations of the TekGear firmware and TekGear provides no help in writing custom firmware.

Also, for anyone inclined to comment, I'm weighing the choice of spending the time to bootstrap custom Twiddler firmware vs crafting a Twiddler like device from scratch.

The chipset on the Twiddler is:


Hello guys,

There are different brand of keyboard available in the market. These keyboards are not ever lasting. Membrane Keyboard are one of the best keyboard for various purposes.A membrane keyboard is a type of computer keyboard whose "keys" are pressure pads featuring the impression of the outlines and symbols on a flat and flexible surface. In almost all modern personal computers and laptops, you will find this type of keyboards is being used, featuring several dome switches. There is only one company named Elecflex has manufactured at very cheap prices.