Turtle

Turtles are essentially robots. They will be in the 1.3 update. They run on TurtleOS. In 1.3, it has been hypothesized by the creator that they may only be able to place blocks, break them, and use a pick-axe as tools for the base 1.3.

They can be coded to place blocks, or move. Their programs are stored on floppy disks.