LoKey

LoKey is a keyboard that actively tries to make typing difficult. It's good at one thing: being bad. We've thought of exactly one potential use case: keeping you from typing texts you will regret while impaired. That said, it will also keep you from bothering to type when you aren't, so we'll let you figure out your own use case. Good luck with that.
PLEASE DO NOT EXPECT THIS TO BE AN ACTUALLY USEFUL APPLICATION.

LoKey provides several configurable features to frustrate you, including randomly swapping keys every time you press one and adding a signature to every text box you press the done key in. And there's room for more in the future!

LoKey was developed as a hackathon project at Wright State University and is open-source. You can find the source code on Github here:
https://github.com/rollforbugs/lokey