Interstellar Missions
- News on advanced propulsion technologies for space travel from universtites, organisations and companies.
- http://www.interstellarmissions.com

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.
- http://www.xprize.cz

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.
- http://www.solar-thruster-sailor.info

HobbySpace - Launch, Propulsion & Spaceflight Systems
- Looks at the many types of launch vehicles and propulsion technologies that are in service or proposed.
- http://www.hobbyspace.com/Links/LaunchPropulsion.html

Earth-to-Orbit Transportation Bibliography
- A look at the various propulsion technologies that could be used to provide cheap transport into orbit.
- http://www.islandone.org/LEOBiblio/

How Space Exploration Will Work
- Illustrated narrative shows a number of advanced space concepts.
- http://www.howstuffworks.com/category.htm?cat=Spaceww

Swiss Propulsion Laboratory
- Aims to develop systems to transport small civilian payloads into a low-earth orbit (LEO).
- http://www.spl.ch