Voiceglo
VoIP service offering free and paid plans. Some plans require phone adapter or USB phone with an Internet-connected computer.
Redshift Networks
Operates and builds international carrier networks using VoIP and TDM circuit transmission technologies.
Super Technologies, Inc
Offers flat-rate unlimited calling within USA& Canada. Uses analog telephone handsets via broadband telephone adapter.
http://www.virtualphoneline.com
http://www.virtualphoneline.com
Voice over IP Calculator
Free VoIP resources, including online bandwidth calculators, white papers, books, a directory and a forum.
http://www.voip-calculator.com/
http://www.voip-calculator.com/
VoIP Providers List
Information exchange for VoIP partners offering minutes termination and origination, as well as hardware and software trade.
http://www.voipproviderslist.com
http://www.voipproviderslist.com
One Unified Net
A communications infrastructure provider includes IP systems, services, softswitches, and phones.
VoIPOnline
Voice-over-IP news, supplier directory and chatrooms for discussing related industry topics.
Vinculum Communications
VoIP wholesale international termination services provider.
VoicePulse
VoIP service offering phone-to-phone with device. Various features and calling plans.
Efonica
Prepaid system for PC-to-phone and web initiated phone-to-phone using VoIP.
iConnectHere
Offers VoIP-based PC-to-Phone, Broadband Phone and Calling Card services.
VoipXchange
B2B VoIP exchange platform for carriers to buy/sell excess capacity on VoIP networks covering call termination in 250+ countries. No-fee membership required.
Talafone
Canadian based provider of PC-to-phone and IP phone services and hardware.
RhinoBell
PC to phone, phone to phone using device, voice over internet calls.
Calleveryone.com
A full featured VoIP/broadband phone to phone service primarily for calls within the US.
Dow Networks
Provides Voice over IP and telecom service to international clients.
MeaPhone
PC to phone service based in Thailand. Software download required.
Asterisk
An open source telephony switching and private branch exchange service. Allows peer-peer calling using a variety of voice over internet protocols.
SIPphone Inc.
Peer-peer calling service. Requires SIP adaptor and phone.
Skype
Peer to peer internet voice service. Requires PC for both callers.
Mywebcalls
PC-Phone or device-to-phone United Kingdom based service.
PC2call
PC-phone internet voice service provider based in the United Kingdom.
ISPhone Inc.
Wholesale voice over internet services.