Theoretical Space Science
This site has some ideas on some alternative science and unconventional science topics such as free energy, over unity machines, space travel, mathematics, computer science and perhaps time travel.
http://science.radioelectronics.biz/

Rocket and Space Technology
Extensive information on orbital mechanics, rocket propulsion and propellants. Includes spacecraft and launcher specifications and lists of space flights.
http://www.braeunig.us/space/

Concorde International Travel
Airfares database and travel technology available to travel agents, consolidators and airticket wholesalers, plus passenger and freight airline representation.
http://www.concorde.com.au/

Space Technology
The website for the aerospace industry
http://www.space-technology.com/

Space Travel and Exploration
Discover and explore the universe: planets, star systems, black holes, cyberspace, ISS, space shuttle, rockets, satellites, and telescopes.
http://www.spacehike.com/

Space Transportation
NASA Marshall is leading the space transportation revolution by developing technologies to make future space transportation like today's air travel.
http://www.spacetransportation.com

Space Vehicles Directorate of the Airforce in USA
Offers an overview of space military missions in USA, technology, news and events. Missions includes space-based surveillance and space capability protection.
http://www.vs.afrl.af.mil/

Andrews Space & Technology
Aerospace company that specializes in enterprise and technology development for the emerging space markets.
http://www.andrews-space.com/

Sven's Space Place
A resource for spaceflight history, space radio tracking and space technology
http://www.svengrahn.pp.se/

Spectrum Astro Incorporated
Prime contractor providing space-technology products and services ranging from space electronics manufacturing of complex space systems.
http://www.spectrumastro.com