Martha's Vineyard Commission - Regional land use planning agency of island. Information and resources on managed growth planning. - http://www.mvcommission.org/
Sheriff's Meadow Foundation - A land trust preserving land in all the islands communities. Includes event information as well as maps and trail guides. - http://www.sheriffsmeadow.org/
Tisbury Waterways Inc. - A non-profit organization working to protect the islands waterways. Background on projects, news and gift item sales are included. - http://www.tisburywaterways.org/
Vineyard Open Land Foundation - Includes mission statement, property profiles, contact list, and funding information. - http://www.islanderis.net/users/volf/
Friends of Sengekontacket - Organization whose mission is to protect and preserve water quality in Sengekontacket Pond. Membership information, activities and educational information are provided. - http://www.sengekontacket.org/
Martha's Vineyard Shellfish Group - Nonprofit consortium of Shellfish Departments on Martha's Vineyard which strives to preserve and expand the island's traditional shellfisheries. - http://www.mvshellfishgroup.org/