Space Island Group
Developing a plan to design, build and operate commercial space transportation systems and destinations dedicated to commerce, research, satellite repair, manufacturing, and space tourism.
http://www.spaceislandgroup.com

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
http://www.geocities.com/Area51/Cavern/8434/spacecol.htm

Space Mechanical & Thermal Engineering Group
Design of space flight instruments, providing a range of services from conceptual studies to detailed design and analysis and the definition and management of tests.
http://www.sstd.rl.ac.uk/Mectherm

DaedalusaL4 Guide
A detailed design study on the construction of a 10,000 person space settlement in Earth orbit, using current technology. Winner of he Grand Prize in the NASA Ames Space Settlement Design Contest 2000
http://www.daedalusal4.utvinternet.co.uk/

321 Space
Contains photographs from ground and space based sources including, the Hubble Space Telescope, Nasa, and the European Space Agency.
http://www.321space.com

University of Toronto Space Design Contest
Offers a contest in space system design for high school students.
http://utsdc.sa.utoronto.ca/

Space Wander
Fly to Mars and Jupiter! Travel through deep space! SpaceWander's award-winning multimedia space trip features real NASA images! Check out our space store for space book, space videos, telescopes, and NASA hats. You can even buy a REAL SPACE TRAVEL! SpaceWander's trip through the Universe features space pictures of Mars, Jupiter and Hubble images of stars, nebulae and galaxies.
http://www.spacewander.com

James Oberg's Pioneering Space
Provides article collection and research on the Russian and US space programs, Mir and the International Space Station, by an author of numerous books in the space domain.
http://jamesoberg.com

International Space Settlement Design Competition
The International Space Settlement Design Competition for high school students is a world-wide contest for designing space colonies.
http://spaceset.org/

Committee on the Peaceful Uses of Outer Space (COPUOS)
Resource on Space Law and a register of objects and space debris launched into Outer Space by an office of the United Nations.
http://www.oosa.unvienna.org/COPUOS/copuos.html