AIAA - Space Colonization Technical Committee
- Committee of the American Institute of Aeronautics and Astronautics formed in 2002, to promote the identification and development of advanced concepts, science, and technology that will support, enhance and enable permanent human presence in space.
- http://www.aiaa.org/portal/index.cfm?getcomm=195

Aceize - Space Colonization Research
- Articles on technologies and science for human space colonization.
- http://www.aceize.com

Space Settlement - National Space Society
- Collection of essays, articles, studies, and other reference materials on all aspects of colonizing and settling space.
- http://www.nss.org/settlement/

Office of Space Commercialization
- US Government office - studies on market for space tourism, satellite industry, and other aspects of space development.
- http://www.nesdis.noaa.gov/space/

Space Colonies
- Full text of the 1977 CoEvolution book _Space Colonies_, which is now out of print.
- http://www.nas.nasa.gov/About/Education/SpaceSettlement/CoEvolutionBook/

Space Settlement
- NASA research office offering introduction to the subject with studies, on-line books, links and a student contest.
- http://www.nas.nasa.gov/About/Education/SpaceSettlement/

Astrosociology.com
- Study of sociological aspects of space exploration and settlement.
- http://www.astrosociology.com/

Space Colony Artwork 1970s
- A collection of images from early NASA work on large-scale space habitats.
- http://www.nas.nasa.gov/About/Education/SpaceSettlement/70sArt/art.html

Inter PlaNetary Internet
- Internet Society special interest group focused on deep space, long time-lag communications.
- http://www.ipnsig.org/

The Apollo Society
- Organization dedicated to advance space exploration and the establishment of human communities beyond Earth.
- http://apollo-society.org/

L5: First City In Space
- IMAX 3D film (1996) on how humans may live and travel in our solar system a century from now.
- http://www.imax.com/films/now_playing/L5.html

Starships and Space Colonies
- Technology and engineering discussion of possible orbital space colonies designs.
- http://website.lineone.net/~geowood/

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.
- http://bioastroroadmap.nasa.gov/index.jsp

Space Settlement - Colonizing the Cosmos
- Al Globus' studies, reviews, and links on the subject of O'Neill-style space settlements.
- http://space.alglobus.net/

The Space Flag
- A flag designed to be flown by supporters of space colonization.
- http://www.spaceflag.com/

International Space Settlement Design Competition
- An annual event in which teams of high school students prepare designs for cities in space.
- http://spaceset.org/

Artificial Gravity
- Articles on rotating structures by Ted Hall, with links to dissertation, conference papers, and software.
- http://www.artificial-gravity.com/

Interstellar Missions
- News of breakthroughs in propulsion physics and the search for extra-solar planets that will enable missions beyond the solar system.
- http://www.interstellarmissions.com

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.
- http://community.webtv.net/Denlen/OFFWORLDTRAINING

Space Solar Power Workshop
- Discussion of the energy path for space development.
- http://www.sspi.gatech.edu/

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.
- http://future25.org

The Space Settlement Institute
- A non-profit association founded to help promote space colonization; emphasis on property rights law.
- http://www.space-settlement-institute.org

The Preparation
- Links between nanotechnology and space colonization; essays on the transhuman future.
- http://thepreparation.com/

Space Solar Power Monitor
- News, discussion, links to latest information on SSP.
- http://www.wronkiewicz.net/ssp/

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.
- http://www.daedalusal4.utvinternet.co.uk/

NASA Ames - Space Settlement Contests
- Annual design contest for school-age kids, grades 6-12. Links to winning designs.
- http://www.belmont.k12.ca.us/ralston/programs/itech/SpaceSettlement/Contest/

Space Elevator Reference
- Scientific, engineering, economic and policy challenges inherent in constructing the solar systems first space elevator.
- http://www.spaceelevator.com/

Notable Nearby Stars
- Information about nearby star systems out to 65 light years.
- http://solstation.com/stars.htm

SpaceArchitect.org
- AIAA subcommittee on aerospace architecture in space and on Earth.
- http://www.spacearchitect.org/

National Space Society Roadmap for the Settlement of Space
- List of Milestones and Barriers to Space Settlement
- http://www.nss.org/community/roadmap/

The Space Settlers' Society
- contacts and articles on European space advocacy, ramjets, and space tourism.
- http://homepage.ntlworld.com/andy-nimmo/Webpage2a.htm

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.
- http://www.oregonl5.org/

Laying the Foundation for Space Solar Power: (2001)
- National Research Council study of NASA's late 1990's space solar power efforts.
- http://www.nap.edu/books/0309075971/html/

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.
- http://spacesettlement.org/

Galleria 2433
- Ideas for colonizing the moon, Mars, the asteroid belt and the galaxy.
- http://interzone.com/~cheung/Gallery.dir/pg.gallery3.html

Living on Green Islands in Space
- Information about O'Neill-type orbiting habitats and why we may want to built them.
- http://www.dse.nl/~hkl/e_space.htm

Island One Society
- Propulsion systems, business ideas, archives of space meetings and journals, and political advocacy for the space frontier.
- http://www.islandone.org

Space Studies Institute
- The organization founded by Gerard O'Neill, with detailed information about his space settlement proposals.
- http://www.ssi.org

The Space Frontier Foundation
- Articles, discussion sites, meetings, and government advocacy dedicated to opening the space frontier as rapidly as possible.
- http://www.space-frontier.org