Shapeways designer TreadshotA1 was first posting accessories and upgrade parts for action figures (mainly transformers), but they have been recently uploading some pretty wild fully transformable (and more importantly completely original) figures. These characters have ranged from robots that turn into cool science fiction vehicles to things like a traffic light. It's a pretty impressive evolution of a Shapeways designer: https://www.shapeways.com/designer/TreadshotA1