Mustard Seed Associates in Seattle is a network for Christians interested in cultural innovation. It is a resource for information about cohousing.

Wonderland Hill Development Co. in Boulder, Colo., has developed 20 communities and is working on several more. The core values of the organization are based on “personal values, community, organic design, and sustainable building practices and principles.” James W. Leach is president; Terri Furman is director of sales and marketing.

Silver Sage Village in Boulder, Colo., broke ground in August 2006 and is Colorado’s first cohousing development for seniors. With a spiritual core, the ecofriendly community has a common meditation room.

Sand River Cohousing is a 26-family community of elders developed in Santa Fe, N.M., based on shared values, including spiritual growth. Contact Coreen Plewa.

The Oakcreek Cohousing Community was completed in 2012 and is run and staffed by the community members themselves. It houses seniors in its 24 units and works to create an interdependent, supportive community. It is located in Stillwater, Oklahoma.

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.

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.

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.