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National Association of Rocketry - http://www.nar.org/
The NAR is the oldest and largest sport rocketry organization in the world. |
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http://www.tripoli.org/ - 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. |
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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. |
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Richard Nakka's Experimental Rocketry - http://www.nakka-rocketry.net/
General information on what amateur experimental rocketry involves, and considerable specific information on motor and rocket design. |
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Vlaamse Raket Organisatie - http://www.vro.be
The Flemish Rocket Organization aims to promote rocket related sciences, including research into motors and propellants, flight electronics, and the design, constructing, testing and launching of rockets. English and Dutch. |