[soveran]

I've always used MessagEase (both on Android and iPhone). It is a keyboard layout that was originally designed for the Palm Pilot, and it is optimised for typing with one finger. I don't use any sort of autocompletion, yet I'm usually the fastest typist in the room. More info: http://www.exideas.com/ME/index.php

[pshirshov]

Yeah. It's a shame that the project is abandoned, bugs aren't being fixed and the source code isn't open.

[kigiri]

Yeah, I really love this keyboard, if only it was still alive, didn't find a successor