Antimatter
Advanced Space Propulsion Study: Antiproton Annihi, Antihydrogen - A New Energy Source?, Future Technology: Antimatter Propulsion, NASA: Antimatter and Fusion for Rocket Propulsion, Positronics Research, LLC, When Isaac Met Albert
Electric
Centrospazio, Electric Propulsion, Electric Propulsion and Plasma Dynamics Laboratory, Electric Space Propulsion, Electric Spacecraft, Inc., Hall Thruster Experiment, How Electromagnetic Propulsion Will Work, Interstellar Transportation and Exploration, Ion Propulsion FAQ, Mini-Magnetospheric Plasma Propulsion
Nuclear
How Stuff Works: How Fusion Propulsion Will Work, Innovative Nuclear Space Power and Propulsion Inst, NERVA, Nuclear Thermal Propulsion, Nuclear Thermal Propulsion, NuclearSpace
Unproven Concepts
Field Resonance Propulsion, FuturePropulsion, Gravitational Propulsion Reseach Group, Gyroscopes As Propulsion Devices, Quasi Moto: Theoretical Propulsion Physics, Stellarotor / Centrifugal Pulsatory, Theory for Gravitic Propulsion
Cosmos 1: the first solar sail
The Planetary Society is developing and conducting a privately funded solar sail project with Cosmos Studios. The spacecraft will be developed, launched and operated in Russia.
Earth-to-Orbit Transportation Bibliography
A look at the various propulsion technologies that could be used to provide cheap transport into orbit.
HobbySpace - Launch, Propulsion & Spaceflight
Looks at the many types of launch vehicles and propulsion technologies that are in service or proposed.
How Space Exploration Will Work
Illustrated narrative shows a number of advanced space concepts.
Interstellar Missions
News on advanced propulsion technologies for space travel from universtites, organisations and companies.
List of Space Propulsion Methods
Attempts to list all known space propulsion methods.
Propulsion Research Center
(part of Marshall Space Flight Center). Gives details on current research projects.
Propulsion Tutorial
Explains the different propulsion systems that could be used to send humans to Mars.
Solar-Thruster-Sailor
Solar Sail with hybrid propulsion, using light pressure and ion thruster to produce thrust. Spacecraft Building System to build large, light weight space structures in a fast and simple way.
Swiss Propulsion Laboratory
Aims to develop systems to transport small civilian payloads into a low-earth orbit (LEO).
The Sunflower Project
A proposed space transportation system which consists of two parts: rotocrane moving in an atmosphere only, and sunflower moving in a space plasma. Description of the theory and state of development.