BPM Counter Widget - Compute the BPM and put it into iTunes
Version: 1.0.2BPM Counter Widget is a free and easy to use Dashboard widget whichwas made to fill the BPM field of iTunes.
Operating System: Mac OS X
Tap the beat of the current track with your keyboard or your mouse, and the widget will compute the BPM and put it into iTunes.
Then it's up to you to create some fancy smart-playlist using BPM (fast tracks for your running playlist and slow track for your romantic nights...)