The American Community Gardening Association is a nonprofit membership organization that works to promote and support all aspects of community food and ornamental gardening, urban forestry, preservation and management of open space, and integrated planning and management of developing urban and rural lands.
The Trust for Public Land is a national, nonprofit, land conservation organization that conserves land for people to enjoy as parks, community gardens, historic sites, rural lands, and other natural places.
NUCFAC is an appointed advisory council to the Secretary of Agriculture on urban forestry and related issues. It was founded to synthesize the full spectrum of views into a consistent vision, as a foundation for practical policy on the health and future preservation of America's urban forests.
Community organizing handbook designed for use in urban settings and created by the Vancouver, BC Community Network is meant to encourage the emergence of more active citizens through practical assistance.
The OSU Extension seeks to develop skills necessary to help achieve individual and community goals and help create an inclusive decision-making environment. Of particular note rate the "fact sheets" on building coalitions and community organizing.