| Business | Phone |
| Black Diamond Software 90 Grove St # 109, Ridgefield 6877 | (203) 431-9600 |
| Cep Systems 9 Berthier Pl, Ridgefield 6877 | (203) 438-6150 |
| Dci Consulting 158 Danbury Rd # 1, Ridgefield 6877 | (203) 431-3900 |
| One Call It Inc 153 W Mountain Rd, Ridgefield 6877 | (203) 438-3100 |
| Lissan Computing Co Inc 80 Grove St, Ridgefield 6877 | (203) 431-8755 |
| Hudson Computer Consulting 9 Chipmunk Ln, Ridgefield 6877 | (203) 792-0853 |