Groundwork Providence
- Environmental non-profit working to improve the urban environment. In addition to information about the group's projects, provides profiles of city natural areas and advice on topics ranging from recycling to bikes.
- http://www.groundworkprovidence.org

Southside Community Land Trust
- The mission of SCLT is to promote community gardening, facilitate environmental education, and act as a catalyst for the other community needs.
- http://users.ids.net/~sclt