American Planning Association   Encourages planning that meets the needs of people and society.
American Discovery Trail   East to west coast trail across America.
American Farmland Trust  A private, nonprofit organization founded in 1980 to protect our nation's farmland.
American Hiking Society   The only national organization dedicated to serving hikers and protecting the nation's hiking trails.
American Trails   Leads the nation toward a comprehensive trails infrastructure for  recreation, health, and travel.
Association of Pedestrian and Bicycle Professionals  Promotes excellence in the professional discipline of pedestrian and bicycle transportation.
Bicycle and Pedestrian Information Center   Good outreach and promotion plants the seeds for initiating change.

Congress for New Urbanism

The Conservation Fund

Cyburbia

Information on planning, sprawl, redevelopment, urban revitilization, etc.
Environmental Law Institute   To advance environmental protection by improving law, policy, and management.
Environmental Support Center   ESC's goal is to improve the environment in the United States by enhancing the health and well-being of organizations.
Greenways, Inc.   Environmental planning and landscape architectural firm that specializes in providing consulting services.

Land Trust Alliance   The national leader of the private land conservation movement.
National Association of Recreation Resource Planners Advances the Art, the Science and the Profession of Recreation Resource Planning.
National Association of Service and Conservation Corps  Supports achieving the nation's youth development, community service and environmental restoration goals.

National Center for Bicycling and Walking   (Formerly the Bicycle Federation of America) works for more bicycle-friendly and walkable communities.
National Recreation and Parks Association   "To advance parks, recreation and environmental conservation efforts that enhance the quality of life for all people."
National Transportation Enhancements Clearinghouse

Information and ideas for improving quality of life, expanding travel choice, and improving the environment.

Natural Trails & Waters Coalition

The Nature Conservancy

Partners for Livable Communities

Working to restore and renew communities.
Scenic America
Sierra Club
Smart Growth Network
Sprawl Watch Clearinghouse
Surface Transportation Policy Project
Sustainable America
Sustainable Communities Network
Trust for Public Land