| 1. | Jetex Engineering Works | | | Reference resources about Jetex and Jet-X micro rocket motors and propellants, plus gas generator experiments and propellant development projects jetex.org |
| 2. | RRS | | | The Reaction Research Society is the oldest continuously operating amateur experimental rocket group in the United States. www.rrs.org |
| 4. | Blacksky | | | Real rocket science. With references and design equations. www.blacksky.com |
| 5. | Amateur Experimental Rocketry | | | 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. www.rocketry.org |
| 8. | Tripoli | | | 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. www.tripoli.org |
| 10. | AeroPac's | | | organizes regular high power rocket launches in Northern California and Nevada. www.aeropac.org |
| 11. | Swiss Propulsion Laboratory | | | SPL develops propulsion elements for sounding rockets like LOX valves, injectors, regeneratively cooled combustions chambers, igniters, propellant feeding systems and thrust test stands. www.spl.ch |
| 12. | Richard Nakka's Experimental Rocketry | | | General information on what amateur experimental rocketry involves, and considerable specific information on motor and rocket design. www.nakka-rocketry.net |
| 13. | CTRA-NARCONN | | | Connecticut Tripoli and National Association of Rocketry. Lists launch information, recent launch photos, contact information or member application. www.ctra-narconn.org |
| 14. | The Civilian Space Exploration Team | | | Images and news from a rocket building private association aiming to launch the first amateur built rocket into space. www.civilianspace.com |
| 15. | Ben's Chemical Propulsion | | | Tutorials on amateur experimental rocketry, along with videos, launch reports, and pictures. wildmanben.tripod.com |
| 17. | Trailer Trash Aerospace | | | A group of high-power and experimental rocket enthusiasts in the desert southwest building magnificent things with the thinnest of resources. www.trailertrashaerospace.com |
| 19. | Designing Rocket Motors | | | Publications, articles, software and discussion groups about chemical rocket motors. www.chemroc.com |
| 20. | aRocket | | | Resources for amateur and experimental rocketeers. www.arocketry.net |
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