Windows utility to render which key I am pressing on-screen

KeyPosé is a free alternative to MousePosé for Windows. You can see it in action in the screencast.

Here is a sample screenshot:

I highly recommend Carnac The Magnificent. It's nicely executed, nicely designed and open sourced on GitHub project that really solves this problem well.

A keyboard logging and presentation utility for presentations, screencasts, and to help you become a better keyboard user.

There is a fork with visualization of mouse input here: https://github.com/bfritscher/carnac/releases

I would like to share my tool -- keycastow.

https://brookhong.github.io/2014/04/28/keycast-on-windows.html