[Wear-Hard] Chording keyboards

[Luke S. Crawford]

Now that the twiddler is out of production, what are folks using for 
wearable input?  there was talk of an open twiddler clone called the 
fiddler: http://www.mbhs.edu/~ojenkins/wearable/fiddler.html  but that's 
not been updated in 7 years.   It seems that with the advent of cad/cam 
services aimed at hobbyists like bigbluesaw, creating our own keyboard 
ought to be easier than it was in years past.

What 'open' keyboard designs have other people implemented?

Are there any COTS input systems currently in production that work well 
for text input while moving about that I'm missing?  I've read of the 
FrogPad, but it looks like it wasn't really made for wearable use; 
overall it seems a much weaker product than the twiddler.