Sixth Sense is a wearable gestural interface that uses hand gestures and motions to allow users to interact with digital information projected onto any surface. It consists of a pocket projector, camera, and mobile phone that work together to project information and allow interaction through hand gestures without the need for physical devices like keyboards or mice. Some potential uses include sign language recognition, augmented reality applications, controlling devices through gestures, and creating alternative computer interfaces that make the entire world a computer interface. The goal is to make the technology widely available and adapt computers to human needs through more natural gestural interaction.