aerospike engine
air-breathing engine
antimatter propulsion
apogee kick motor
arcjet

contact ion thruster

electric propulsion
electromagnetic propulsion
electron bombardment thruster
electrostatic propulsion
electrothermal propulsion

F-1
Fastrac engine

gaseous-propellant engine

H-1
Hall effect thruster
helicon thruster
hybrid-propellant rocket engine

ideal rocket
inertial upper stage
interstellar ramjet
ion propulsion

J-2

laser propulsion
liquid-air cycle engine
liquid-propellant rocket engine

M2P2 (Mini-Magnetospheric Plasma Propulsion)
microwave plasma thruster
magnetoplasmadynamic (MPD) thruster
methane rocket engine

nuclear electric propulsion
nuclear propulsion
nuclear pulse rocket

photon propulsion
posigrade rocket
pulse detonation engine
pulsed plasma thruster

reaction control system
resistojet

solar electric propulsion
solid-propellant rocket motor
strap-on booster
sustainer engine

ullage rocket

vacuum energy drive

XIPS (xenon-ion propulsion system)