measures the rate of your mouse clicks and keystrokes. You can use ArBPM to calculate the rate of music beats, heartbeats, writing speed, and more. The program displays its results in BPM (beats per minute), Hertz (beats per second), beats per hour, or mean time interval (in seconds). It runs as a very small window that you can place on top of other windows, and its appearance is customizable via "skin&quot\; files.