Islamic Society of Boston
- Information on the mosque, media center, religious, educational and recreational activities.
- http://www.isboston.org/

First Parish Unitarian Universalist
- "An old church for a new world" in the center of Harvard Square.
- http://www.firstparishcambridge.org/

Ethical Society of Boston
- A secular religious and educational fellowship without formal creed or dogma. Meets in Harvard Square.
- http://www.bostonethical.org/