The Stiefel Freethought Foundation provides strategic and financial assistance to the freethought movement. The foundation strives to gain respect for freethinkers and ensure total separation of church and state. Todd Stiefel of Raleigh, N.C., is founder and president.

The Skeptics Society is a scientific and educational organization that investigates fringe science and paranormal claims and strives to promote critical thinking. Michael Shermer is executive director, and he also serves as publisher of the group’s magazine, Skeptic.

The Robert Green Ingersoll Birthplace Museum in Dresden, N.Y., is described as America’s only freethought museum. It tells the story of the noted 19th-century agnostic orator, including his most famous speech, “Ghosts.”

Arboretum Cohousing is a 40-unit development in Madison, Wis. It includes affordable housing through Habitat for Humanity of Dane County.

The Richard Dawkins Foundation for Reason and Science supports “the scientific education, critical thinking and evidence-based understanding of the natural world in the quest to overcome religious fundamentalism, superstition, intolerance and human suffering.” The U.S. branch has headquarters in Washington, D.C., and is led by executive director R. Elisabeth Cornwell.

Delaware Street Commons, under construction in Lawrence, Kan., is the first cohousing project in the state. It is multigenerational, uses consensus decision-making and values community and sustainability.

Project Reason is a nonprofit foundation dedicated to promoting secular values and scientific knowledge. Sam Harris is co-founder and chairman. Contact through the website.

The Tuscaloosa Cooperative Association, in Tuscaloosa, Ala., is a new group exploring environmentally sustainable cohousing for the area. Charles Nuckolls, a professor of anthropology at the University of Alabama, says the group would like to create an American village.

Orange Twin Conservation Community is a developing eco-village that grows from a record label in Athens, Ga.