I've been working for two years on an open source application platform for ESP32. It's a light-weight operating system that can download and run native applications. I wrote an article about the developments in the past year.
It's still not much, but more will be made in the coming months. I wanted to stabilize the APIs a bit more before making more apps.
I almost finished a Diceware app.
Using control for the most common operations is much more straining for the hand. It is especially noticeable by heavy keyboard users such as software developers. Using your thumb to hit CMD (or Alt on a Win keyboard), is much less straining.