If all goes according to plan, it will roll out free voice messaging and expand the service across Europe and later, China.

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Its only product was a free voice- and text-messaging service for cellphone users.

FORBES: Magazine Article

You can't completely pigeonhole Skype when it serves both as a partial substitute for traditional phone service and an instant messaging service with voice and video on top.

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This means adding features to the Rebtel service such as group chat, voice messaging and video.

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CallWave is now focused on a new service, called Fuze, which brings all forms of communication (instant messaging, alerts, voice and video) together on any portable device.

FORBES: Magazine Article

London-based Skype Technologies distributes an application that works like an instant messaging service, but instead of trading text, users plug in a microphone and speakers and have a voice conversation.

FORBES: Message In A Bottle