- DallasXtreme
- Provider of Ventrilo server hosting, with several levels of service.
- iBasis
- Providing international calls through a global VoIP network.
- IP Stream
- Resource for VoIP news and IP telephony information. With a discussion forum and vendor links.
- Packetizer
- Site provides various information and resources related to VoIP and videoconferencing.
- VoIP.org.uk
- UK resource for Internet telephony information. Presents how-to articles, news, and answers to frequently asked questions.
- VoIP-info.org
- Reference covering various topics related to Voice Over Internet Protocol. Includes news and practical guides.
- Yahoo! Voice
- Provides free PC to PC calls, PC to landline and mobile phone calls at cheap rates, and mobile or landline to PC voice communications.
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