KeyCastr - KeyCastr lets you easily display your keystrokes while recording screencasts.
PointerFocus - Allows you to highlight the cursor using either the toolbar or hotkeys.
Screenkey - Screenkey is a screencast tool to display your keys inspired by ...
Pen Attention - A free program that places a highlighted circle or square around the cursor for use in a classroom...
Carnac - A utility to give some insight into how you use your keyboard/
Simple Mouse Locator - Simple Mouse Locator reveals the mouse position via a momentary or permanent locator.