- Harvard Square Business Association
- Cambridge Historical Commission
- Cambridge Local First
- Harvard University
- The Cambridge Center for Adult Education
- The Brattle Theatre
- Club Passim
- Harvard Film Archive
- Hasty Pudding Theatricals
- Revels
- Tango by Moonlight
- Cambridge Historical Society
- Holiday Craft Fair
- Nameless Coffeehouse
- Harvard Square Photo Blog
- Harvard University Hotel Network