Metronomic - Simple metronome widget that will help you count beats
  61 KB | Mac OS X 10.4 or later | Freeware

Metronomic is a free abd easy to use widget for Dashboard OS X. Metronomic is just a simple metronome that will help you count beats.

For those who are unfamiliar of what a metronome is, it is a device that comes in both analog and digital forms, where it counts beats and emits a sound to help musicians keep their rhythm constant.