https://www.icehousenh.com/
on Little Squam, Route 3. They do small batches so the available flavors can vary. They are not open for the season yet. We went last year. Yum!
Social Club in Lakeport
Papa Beans in North Sandwich on Wing Road off of 113A. (It's self serve)
Sandwich Creamery ice cream is available in the North Sandwich store on 113. (Also self serve)
All are good with some eclectic flavors.