LiftPort - The Space Elevator Company
- Offering information and project documents by a company aiming to construct space elevators.
- http://www.liftport.com/

Blue Origin
- Vertical takeoff and landing vehicle funded by Jeff Bezos of Amazon.
- http://public.blueorigin.com/index.html

Experimental Rocket Propulsion Society
- A LEO launcher development by a group of space enthusiast. Features engine and vehicle designs, project descriptions and membership information.
- http://www.erps.org/

StarClimber Space Elevator Team
- Official web site of the StarClimber Team, developing a space elevator prototype for entry in NASA/Spaceward.org's Climber Competition.
- http://www.mnkscientific.com/

Nasa X-Planes
- Provides a centralized location for information on NASA X-aircraft. Also provides links to photos, fact sheets, line drawings and movie clips.
- http://www.dbum20.20m.com

Hypersonic Waveriders
- Hypersonic flow theory and applications to waveriders and other hypersonic flight vehicles.
- http://www.aerospaceweb.org/design/waverider/index.shtml

Space Launcher: Pylon Turn Wing Concept
- An hypothetical alternative space launch system.
- http://www.shoalhaven.net.au/~eureka/spacelauncher.html

Rotational Slingshot Catapult
- Provides a space enthusiast's view of the possibility to use alternative means for propulsion of spacecraft.
- http://solar-thruster-sailor.info/rsc/rsc.htm

Sky Ramp Technology
- Information on sky ramp technology and its applications.
- http://www.g2mil.com/SRT.htm