[eloeffler]

Just leaving some links here because I had been researching this intensively before a planned shoulder surgery:

(Definitely adding this to my list)

Frogpad: German language one handed keyboard. Unfortunately discontinued http://frogpad.com/

Mirrorboard (my favorite): Intruiging mirror solution that builds upon the assumption that it is easier to access muscle memory from the other hand when you've learned it before https://blog.xkcd.com/2007/08/14/mirrorboard-a-one-handed-ke...

Mistel Barocco fully split Keyboard: Can (and unfortunately must) be programmed without software. Right half is the main keyboard. Left side connects to it, works also in standalone mode but is not programmable then. https://mistelkeyboard.com/products/bd20945a731491407807e80d...

[Symbiote]

I was maintaining [1] which might be useful to you, but it's become outdated. It doesn't have a filter for one handed keyboards, but some of the "two halves" ones might be appropriate.

(If someone is interested in taking the site over and bringing it up to date, please open an issue.)

[1] https://aposymbiont.github.io/split-keyboards/

[swannodette]

Some research on this topic http://edgarmatias.com/papers/hci96/

On OS X you can achieve this with Keyb, Karabiner Elements, etc. It's also easy to do with a programmable keyboard with ZMK/QMK. I've set up my Kinesis 360 Pro this way, being symmetrical means I can access every key easily. Hardware support for sticky keys also helps quite a bit.

[GlumWoodpecker]

Just being pedantic and off-topic here, but macOS hasn't been called OS X for nearly ten years:

https://en.wikipedia.org/wiki/MacOS#macOS

[pimlottc]

Twiddler is an older design from the first wave of wearable computers, there are newer revisions that are still being sold afaik

https://en.wikipedia.org/wiki/Twiddler

https://www.mytwiddler.com/

[larusso]

The mirror board is an interesting idea as it allows to start with a normal keyboard and one could then switch to a smaller board with the muscle memory trained. I would prefer a different switch key though. I use cap lock as a layer switch on my keyboards. But I will think about it and try out a few things. It could already be useful in situation where I need to keep my hand over the mousepad.

[stray]

I lost the use of my right hand in '06.

It's amazing how quickly you adapt. I have to put my mouse to the left of my keyboard and whereas before I was a touch typist, I now have to look.

And I can use a standard keyboard without undue hassle.

[giraldo]

Yes, having a special keyboard can be limiting in that it’s a pain to cart around to hook up to laptops, etc. and to get an extra in case it fails.

It still could be nice to have something optimized, though. If you ever design one, please share it, because I think you’d get more interest than you’d think.

I began to have interest in developing for everyone (primarily for differences for vision, though difference in hearing, memory, learning also) about 13 years ago, and got little support from the small company I worked for. We had a very color-specific interface, because we were space-limited. Then, wouldn’t you know it, our next manager was red-green colorblind, but it didn’t bother her.

I got jaded about it, learning that basically no one cared enough, and that people just get ignored and struggle with their adaptive devices. This still pisses me off, and I was once thinking heavily about applying a job where I could do something about it, but I don’t have the required background.

With AI, there’s beginning to be almost no excuse for someone not to add first-class support for all types of people into their interfaces and process, but people still continue to design like everyone is a twenty-something y.o. with full hearing, 20/15 full color vision, 130 IQ average, and no memory or learning differences or other modalities.

[znpy]

The frogpad is most likely the best one. So sad to see it’s been discontinued.