Cube sats are usually used for space but could also be used locally, researchers from Centre Tecnològic de Telecomunicacions de Catalunya(CTTC), the University of Luxembourg, and the Universitat Oberta de Catalunya(UOC) have made 3D printed cubesat that brings internet to disaster areas.
Ursa Major wants to 3D print solid rocket motors in its project
Lynx to augment the US´ arsenal. It hopes to make engines for the Javelin, Stinger, and Guided Multiple Launch Rocket System.
Christien Meindertsma has developed a wool 3D printing Flocks Wobot.