Everyone takes their MacBook to the gym, right? No? Well, if you do—or, more likely, have a computer near your home workout equipment—you might like 3D4Medical.com’s iMuscle ($5). Ported from iOS to the Mac, it’s designed to help optimize your workouts with really cool 3-D graphics of humans stripped down to their muscles.
iMuscle is set up so that you choose the muscle you want to work on first, and are then presented with exercises specific to that muscle. Clicking on any of the thumbnails of the exercises brings up a 3-D animation of the muscle in action. The app boasts over 450 exercises and stretches, plus 360° rotation of any body part.