VoIP

 

Enables you to make cheap calls to anywhere in the world. Offers free download desktop software.

http://www.pc2call.com/

 

A variety of tools for IP telephony devices and services. Includes a forum and reviews.

http://www.voxilla.com/

 

Enables you to use high speed cable or DSL connections to make and receive phone calls. Includes a rate plan and support.

http://www.broadvoice.com/