Sixth Sense is a wearable device developed by Pranav Mistry that uses a camera, projector, and mirror coupled with a mobile phone to augment the physical world with digital information. It allows users to access information about their environment or objects by pointing their hands, and interact with this information using natural hand gestures. The camera recognizes hand gestures and objects, sends this data to the connected mobile phone for processing, and the projector projects the output back onto physical surfaces and objects, blending digital information with the physical world. This effectively gives users a "sixth sense" by bringing intangible online information into the tangible world in a seamless way.