Space

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/

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

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

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

List of Space Propulsion Methods
Attempts to list all known space propulsion methods.
http://www.geocities.com/danielravennest/CanonicalList.html

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

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

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