Control Mac with Gestures Using Webcam
Yes, now you can control mac with gestures! Mac users can try for free the Alpha version of Flutter, an application for OS X that lets you control the computer with gestures.
Flutter does not require any accessory or peripheral, it works just with the camera on the Mac: The idea behind the project is that the body is the remote control and power control music or movies from the comfort of your armchair.
Flutter developers want to go showing your app to consumers, which is Kinect style / EyeToy, and published the Alpha version. Currently only works with iTunes and Spotify but theoretically more apps will be compatible with music and videos. If you are interested in trying Flutter, download it from their website.