From Imperial Penguin:
Brain Shaper is a the desktop port of our successful iPhone and iPad binaural beat based meditation app. The software not only provides 11 quality binaural beat sessions, but includes a visualizer which also flashes your screen with the beat, to help further entrain your brainwaves. The colors chosen for the flashing lights are based upon known facts about the Circadian rhythm of the human body. In addition to the flashing lights and binaural sound patterns, the desktop version of the software offers the option for a 528hz solfeggio tone, believed by some to enhance meditation. Also present in the desktop version are additional ambient sounds to aid in your meditation session, included rain, a babbling brook, and a lullaby.