like keyboard

you can assign keyboard shortcuts to hibernate or suspend the machine with it

CMDbar is a command line utility to control Windows from a keyboard.

Tune Buster Home Edition is a full-featured keyboard synthesizer for OS X.

Plug-n-Play Keyboard Synthesizer.

BarCode Rs232 to Keyboard strokes converter.

ActionRecorder provides an easy way to record keyboard and mouse events.

Use the computer keyboard to play midi. Most keys are customizable.

Transforms PC into a burglar and fire alarm. Monitors mouse, keyboard and MIC.

Teach yourself music notation/keyboard notes on grand staff in all keys. Easy.

The ReplaceKeys prank replaces key presses with other keyboard keys.