Peer to peer internet voice service. Mac, Windows and Linux versions available. Users may call landlines and cellphones for a fee; users may call each other for free.

Operates with different chat systems such as ICQ and AIM, and enables live video calls. [Windows]

Providers of integrated communication solutions, including software to allow web-page visitors to call any telephone from their multimedia PC. A useful solution for customer support.

Use WebPhone software to call any phone, including mobile phones.

Maker of PicoPhone, an Internet phone application with chat.

Free calls and chat anywhere in the world with NetMeeting or CU-SeeMe. Includes voice and video support.

Free Internet Phone Numbers (iPN) allows you to get video conferencing calls from your web site and email messages.

Offers free voice chat with text and sound communications available.