SixthSense is a wearable gesture-based device developed by Pranav Mistry that allows users to interact with information projected onto physical surfaces using natural hand gestures. It consists of a pocket projector, webcam, and mirror worn around the neck. The webcam tracks color markers on the user's fingers to recognize gestures and interact with projected interfaces for applications like making calls, viewing maps, checking the time, and obtaining information about books, products, and flights by scanning them. The system uses computer vision algorithms and augmented reality to seamlessly integrate digital information into the physical world in an intuitive way.