Berkeley Heights, NJ has a community within the community called Free Acres. It is often described as a remnant of Nineteenth Century utopian social philosophy made real in the early Twentieth Century (1910) To find out more about the 66 acres that make up this unique community, take a look at the new Free Acres Website.
Other resources about Free Acres:
Linus Yamane's recollections of growing up in Free Acres.
Judith Gay's piece from Associated Content.
Wikipedia's article on Free Acres
1998 New York Times article, If you are thinking of living in...
2005 New Jersey Monthly article
BHPL has newspaper clipping and photo files and books on New Jersey and Berkeley Heights, NJ which may contain some information on Free Acres.