Screenkey - Screenkey is a screencast tool to display your keys inspired by ...
KeyCastr - KeyCastr lets you easily display your keystrokes while recording screencasts.
Carnac - A utility to give some insight into how you use your keyboard/
Kling - Visually display key presses on Windows screen
PxKeystrokesForScreencasts - Displays Keystrokes in an overlay window
Key-mon - Utility to show live keyboard and mouse status for teaching and screencasts.