So you wish you had more hands to get things done? MetaLimbs might help. We are talking about robot limbs mapped to your legs that can be controlled using your feet. MetaLimbs consist of a positional tracking system and a mounted robotic arm. The system relies on foot and knee sensors for tracking.
Smart socks with bending sensors are used to detect the position of the toes, allowing you to change the grip with your toes. InamiLaboratory has more on the device here.