The National Genealogical Society has been a leading force in genealogical studies since its founding in 1903. NGS offers free online courses in genealogical research, guides for reading complicated document like US Census records, and lots of resources to help with research.
The Federation of Genealogical Societies is an organization that advocates for the preservation and access of genealogical records to the public. They have compiled a huge list of American historical and genealogical societies and are working to digitize old records that are in danger of deteriorating.
FrancoGene is a great source for researching the genealogy of Franco-American and French-Canadian peoples and has a huge database of immigrants to America and Canada from French-speaking countries all around the world.
The Maine Genealogical Society is a non-profit charitable and educational organization. It was founded in 1976 to collect, exchange, preserve, and publish genealogical records, related documents, and information; and to promote and encourage interest and scholarship in genealogy and family history of the State of Maine. In addition to their own records, they have compiled a very useful list of great genealogical resources for the state of Maine.
The Finnish-American Heritage Society is organized for the purpose of promoting, in a social setting, a cultural and educational appreciation of Finland and to explore the traditions of the Finnish families who settled in Maine.They have lots of information on the history of Finland and Finnish immigrants to Maine.
The Maine Irish Heritage Center offers personal consultations in Maine Irish genealogy. The majority of their records stem from the historic landmark that was formerly St. Dominic’s Church, a hub of early Irish Community in Maine.