A 2-storey residence was constructed in China using a 3D printer.
A steel bridge was constructed in Amsterdam using a 3D printer.
Jet Engine Parts
General Electrical uses additive manufacturing to create fuel nozzles for their jet engines.
Space Station (In the Future)
A 3D printer has been sent to space, and has started production! The goal will be for the printer to create a space station.
Bricks that use evaporative cooling (which lowers the temperature of the air by adding water vapor to it) are being printed and used in hot and dry climates to provide more comfortable (and affordable) living quarters.