AeroPac's
- http://www.aeropac.org/
- "Association of Experimental Rocketry of the Pacific" organizes regular high power rocket launches in Northern California and Nevada.
Amateur Experimental Rocketry
- http://www.rocketry.org
- Rocketry.Org maintains a large web database of suppliers for anything experimental rocketry enthusiasts could want, as well as a global rocketry organizations database and book lists.
CTRA-NARCONN
- http://www.ctra-narconn.org/
- Connecticut Tripoli and National Association of Rocketry. Lists launch information, recent launch photos, contact information or member application.
Jetex Engineering Works
- http://jetex.org
- Reference resources about Jetex and Jet-X micro rocket motors and propellants, plus gas generator experiments and propellant development projects
Project Earth Crashlander
- http://celtickane.com/rocketry
- The Chronicles of Experimental Rocketry. Contains several personal rocketry projects that go into detailed explanation that anyone starting in scratch-built rocketry might be interested in.
RRS
- http://www.rrs.org
- The Reaction Research Society is the oldest continuously operating amateur experimental rocket group in the United States.
Swiss Propulsion Laboratory
- http://www.spl.ch/
- SPL develops propulsion elements for sounding rockets like LOX valves, injectors, regeneratively cooled combustions chambers, igniters, propellant feeding systems and thrust test stands.
Tripoli
- http://www.tripoli.org/
- Tripoli is a non-profit organization dedicated to the advancement and operation of non-professional high power rocketry. Tripoli has members in the United States and 20 countries around the world.