The Tiny Tim was an American air-to-ground rocket used near the end of the Second World War.

The Werfer-Granate 21 rocket launcher, also known as the BR 21 in official Luftwaffe manuals, was a weapon used by the German Luftwaffe during World War II and was the first on-board rocket placed into service by the Luftwaffe, first introduced in mid 1943. Based on the 21 cm Nebelwerfer 42 infantry barrage rocket system's hardware, the weapon was developed by Rheinmetall-Borsig under the leadership of Dipl.-Ing. Rudolf Nebel, who had pioneered German use of wing-mounted offensive rocketry in World War I with the Luftstreitkräfte.