PxKeystrokesForScreencasts - Displays Keystrokes in an overlay window
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Screenkey - Screenkey is a screencast tool to display your keys inspired by ...
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Kling - Visually display key presses on Windows screen
LightShot - The fastest way to take a customizable screenshot.