Apollo Society - A nonprofit educational and research organisation dedicated to advancing space exploration and establishing human communities beyond Earth.
Astrianism - Believes that life is abundant in the universe and that intelligent races are many and that the only future for mankind is to expand into the outer space.
First Millennial Foundation - A group of people actively working to make the colonization of space a reality.
Lunar Republic - Currently forming colonization of the Moon and offering citizenship and properites for sale. Also includes lunar citizenship, dictionary, and more.
Space Frontier Foundation - Organisation of Americans dedicated to opening the high frontier of space to human exploration and settlement as soon as possible.
Space Settlement - Details the plans for building space habitats and solar power satellites from extraterrestrial resources as presented in Gerard O'Neill's "The High Frontier".
