General Public Health:

Mass in Motion (MiM): Prevention of overweight and obesity in Massachusetts
Commonwealth Conversations: Massachusetts Department of Public Health blog
Robert Wood Johnson Foundation (RWJF): Commission to build a healthier America
Massachusetts Partnership for Healthy Communities: To build safer, healthier communities
Massachusetts Public Health Association (MPHA)
Centers for Disease Control and Prevention (CDC)

Recreation and Transportation:

Metropolitan Area Planning Council (MAPC): Planning Agency for the Boston metro area
Mystic River Watershed Association (MyRWA): To protect and restore the Mystic River
Bike to the Sea: Building the Northern Strand Community Trail from Malden, MA to Revere, MA
Rails to Trails Conservancy: Creating a national network of trails from former rail lines
Livable Streets Alliance: Promotes transit, walking and biking in urban Boston
WalkBoston: Dedication to improving walking conditions in Massachusetts towns
WalkScore: Ranking of America's most walkable cities
Safe Routes Tip Sheet: Assessing safe walking and bicycling routes
Mystic River Corridor Strategy: Sustainable development in the Lower Mystic Valley

Healthy Food

Healthy City Fall River: Improving the health and quality of life of those who live in Fallriver
Shape Up Somerville: Citywide campaign to increase physical activity and healthy eating
Holyoke Food & Fitness Council: Improving access to healthy food and exercise options
Groundwork Somerville: Promotes sustainable development and revitalization of the community
Farm to School: Connecting K-12 schools with produce from local farmers
CDC StairWELL to Better Health: Using the stairs at work to increase physical activity