| PERMANENT: Rapid development of space using material from asteroids near Earth and from the Moon. |
| Artificial Gravity: Articles on rotating structures by Ted Hall, with links to dissertation, conference papers, and software. |
| Astrosociology.com: Study of sociological aspects of space exploration and settlement. |
| Beanstalk elevator: "Virtual beanstalk" amateur design group for a (small scale) space elevator. |
| Bioastronautics Roadmap at NASA: NASA analysis of critical research and development issues, particularly relating to medical needs, for human exploration and settlement of space; focus on space station, Moon, and Mars mission concepts. |
| Centripetal Vivarium Space Habitats: Advocates, as preferable to lunar colonisation or terraforming, the construction of huge manufactured living spaces that can be spun to create gravitational effects. |
| DaedalusaL4 Guide: Detailed design study for a 10,000 person space settlement in Earth orbit, using current technology. 2000 Grand Prize Winner in Space Settlement Design Contest. |
| Denie's Off World Training: Bodybuilding, weight training, and related matters, with this section covering the problems and need for resistance machine activities in zero-g. |
| Foundation Future 25: Emerging platform for long-term thinking, acting and growth. Supporting space colonization and the development of life and humanity on earth earth, the planets and in the universe. |
| Galleria 2433: Ideas for colonizing the moon, Mars, the asteroid belt and the galaxy. |
| Inter PlaNetary Internet: Internet Society special interest group focused on deep space, long time-lag communications. |
| International Space Settlement Design Competition: An annual event in which teams of high school students prepare designs for cities in space. |
| Interstellar Missions: News of breakthroughs in propulsion physics and the search for extra-solar planets that will enable missions beyond the solar system. |
| Island One Society: Propulsion systems, business ideas, archives of space meetings and journals, and political advocacy for the space frontier. |
| L5: First City In Space: IMAX 3D film (1996) on how humans may live and travel in our solar system a century from now. |
| Laying the Foundation for Space Solar Power: (2001): National Research Council study of NASA's late 1990's space solar power efforts. |
| Living on Green Islands in Space: Information about O'Neill-type orbiting habitats and why we may want to built them. |
| NASA Ames - Space Settlement Contests: Annual design contest for school-age kids, grades 6-12. Links to winning designs. |
| National Space Society Roadmap for the Settlement of Space: List of Milestones and Barriers to Space Settlement |
| Notable Nearby Stars: Information about nearby star systems out to 65 light years. |
| Office of Space Commercialization: US Government office - studies on market for space tourism, satellite industry, and other aspects of space development. |
| Oregon L5 Society: Oregon chapter of the National Space Society; many studies and reports on in-situ resource utilization and related aspects of space development. |
| Space Colonies: Full text of the 1977 CoEvolution book _Space Colonies_, which is now out of print. |
| Space Colony Artwork 1970s: A collection of images from early NASA work on large-scale space habitats. |
| Space Colony Terra Nova: Beyond 2001: Full design from the first place winner (Individual grade 10-12) in the 1997 NASA-Ames Space Settlement Design Contest |
| Space Elevator Reference: Scientific, engineering, economic and policy challenges inherent in constructing the solar systems first space elevator. |
| Space Settlement: Discusses the space settlement proposals of Gerard K. O'Neill, as popularized in his book "The High Frontier". Features pictures and a FAQ. |
| Space Settlement: NASA research office offering introduction to the subject with studies, on-line books, links and a student contest. |
| Space Settlement - Colonizing the Cosmos: Al Globus' studies, reviews, and links on the subject of O'Neill-style space settlements. |
| Space Settlement Initiative: A proposal to grant ownership of land on the moon and Mars to companies that establish settlements and agree to sell passage to anyone willing to pay a fair price. |
| Space Solar Power Monitor: News, discussion, links to latest information on SSP. |
| Space Solar Power Workshop: Discussion of the energy path for space development. |
| Space Studies Institute: The organization founded by Gerard O'Neill, with detailed information about his space settlement proposals. |
| SpaceArchitect.org: AIAA subcommittee on aerospace architecture in space and on Earth. |
| Starships and Space Colonies: Technology and engineering discussion of possible orbital space colonies designs. |
| The Apollo Society: Organization dedicated to advance space exploration and the establishment of human communities beyond Earth. |
| The Case for Space: Articles and short stories by Robert Weidner, on various roads to space colonization. |
| The Preparation: Links between nanotechnology and space colonization; essays on the transhuman future. |
| The Space Flag: A flag designed to be flown by supporters of space colonization. |
| The Space Frontier Foundation: Articles, discussion sites, meetings, and government advocacy dedicated to opening the space frontier as rapidly as possible. |
| The Space Settlement Institute: A non-profit association founded to help promote space colonization; emphasis on property rights law. |
| The Space Settlers' Society: contacts and articles on European space advocacy, ramjets, and space tourism. |
| URANOS: Club for Expansion of Civilization into Space: A group of people, mainly Poles or of Polish origin, who believe that expansion into space is a prerequisite for further development of our civilization. An English version of the site is maintained. |
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