Screenkey - Screenkey is a screencast tool to display your keys inspired by ...
Keyviz - Visualize your keystrokes in real-time
Carnac - A utility to give some insight into how you use your keyboard/
KeyCastr - KeyCastr lets you easily display your keystrokes while recording screencasts.
Kling - Visually display key presses on Windows screen
KeyCastOW - keystroke visualizer for Windows, lets you easily display your keystrokes while recording...