Score
- A volunteer organization of retired executives providing counseling and assistance to those wishing to start or improve their business.
- http://www.scoremaine.org/

Maine Society of Land Surveyors
- Provides membership list, newsletters, and information about land surveyors in the state.
- http://www.msls.org/

AIA Maine
- News, events, chapter meetings, awards and member list for state chapter of the American Institute of Architects.
- http://www.aiamaine.org/

Maine Leaseholders Association
- An organization whose purpose is to improve communications between landowners and leaseholders. Includes legislative alerts and news highlights.
- http://www.maine-leaseholders.com/

Maine Wood Products Association
- Represents hundreds of Maine-based companies manufacturing quality wood products.
- http://www.mwpa.org/

Maine Professional Guides Association
- Composed of Registered Maine Guides who are striving to enhance the standards of the guiding industry. Provides information about the association and gives a list of individual members.
- http://www.maineguides.org/

Maine Society of Certified Public Accountants
- Information about classes, meetings, legislation, and employment in the state.
- http://www.mecpa.org/

Maine Potato Board
- Organization provides information on the potato, dealers, news, events, products and even has recipes.
- http://www.mainepotatoes.com/

Maine Oil Dealers Association
- Learn more about safe, affordable, clean oil heat, and the companies and employees, who deliver goods and services to Maine citizens.
- http://www.meoil.com/

Maine Lobster Council
- Founded in 1991 to promote Maine lobster, Bangor based MLC works to promote the sale of lobsters throughout the world.
- http://www.mainelobsterpromo.com/

Maine Businesses for Social Responsibility
- Promoting ethics, sustainable business practices, and social change through business.
- http://www.mebsr.org/