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