Laziest Susan was built during the 2015 Stupid Shit No One Needs and Terrible Ideas Hackathon by 3 engineers (Rudy Gomez, Andrew Brandt, me).
The project was built using the Arduino, a stepper motor, Bluetooth shield, and a pizza box. The idea was to minimize the manual work needed to spin a lazy susan. By swiping on your phone the laziest susan would spin and deliver the dish to you without having to use energy on your entire arm to get your food.
A simple iOS app was created to map swipe gestures to laziest susan rotation diretion using a bluetooth module attached to the arduino.