- 1TouchTone
- AT&T CallVantage
- Axvoice
- BroadVoice
- CallServe
- DialPad
- eFonica
- Go2Call
- Google Talk
- iConnectHere
- Lingo
- Net2Phone
- Nikotel
- Opex
- Packet8
- PC Call
- PC Telephone
- PalTalk
- Skype
- SunRocket
- ViaTalk
- Verizon VoiceWing
- Vonage
- WebPhone
- Yahoo! Voice

- X-Lite
- SJPhone
- Adore

- Gateways
- IP Phones
- Handsets
- Headsets
- Microphones
- VOIP Store

- AOL Call Alert
- CallWave
- Internet Call Manager
- Buz Me

- Verizon
- SBC/Yahoo

- PhoneHog

- GotVMail
- Kall8

- eFax
- FaxAway