Alliance to Save Energy
http://www.ase.org/

Center for Neighborhood Technology
http://www.cnt.org/

HUD USER
http://www.huduser.org/

US Green Building Council
http://www.usgbc.org/

American Planning Association
http://www.planning.org/

Campaign for Home Energy Assistance
http://www.liheap.org

DSIRE: Database of State Incentives for Renewables & Efficiency
http://www.dsireusa.org/

Enterprise Community Partners
http://www.enterprisecommunity.org/programs/green_communities/

Global Green
http://www.globalgreen.org/

Housing Assistance Council
http://www.ruralhome.org

Institute for Community Economics
http://www.iceclt.org/

NAHB Research Center, Inc.
http://www.nahbrc.org/

National Multi Housing Council
http://www.nmhc.org/

Smart Growth America
http://www.smartgrowthamerica.org