Hands on Helpers:
   http://www.handsonhelpers.org/volunteer-opportunities.htm

Kingston Greenways Association:
   http://kingstongreenways.org/

Millstone Bypass Alert Coalition:
   http://www.princetonol.com/groups/millstone/

Princeton Online Community Groups - Environmental:
   http://www.princetonol.com/groups/environment.shtml

New Jersey State Green Acres Program:
   http://www.state.nj.us/dep/greenacres/link.htm

NJ Trails Association:
   http://njtrails.org/

Princeton Environmental Commission:
   http://www.princetontwp.org/environlinks.html

Princeton Public Library
   FOPOS is in the Community Resource File: http://www.princetonlibrary.org/crf/

Princeton Township's "Community Web Sites" page:
   http://www.princetontwp.org/communitywebs.html

Sensible Transportation Options Partnership:
   http://www.princetonol.com/groups/stop/

Washington Crossing Audobon Society:
   http://www.washingtoncrossingaudubon.org/pages/chapter/wcaslink.htm

West Windsor Citizens for Transportation Alternatives:
   http://homepages.wwptoday.com/advocates/millstone/