Send messages and make audio/video calls from your desktop.
Call all major cities like Vancouver, Edmonton, Calgary, Toronto...
Sri Lanka Telecom
SLTNet Ocw Phone is an online Call Waiting Service.
U.S. Robotics Corporation
Call around the world with USRobotics Cordless Skype Dual Phone.
A free desktop app that turns any PC or Mac into an absolutely free phone line.
An extension to the developer tools in Windows Phone SDK.
Phone Validator - Phone Number Check: Status, Line Type Detection, Location.
Remotely Monitor your Webcam, Desktop, Microphone, or Phone-Line!
Thought Communications, Inc.
Submit faxes directly from your PC without a phone line or modem connected to their computer.
With Gammu you can control your phone from command line.
Speak2phone is a Single Line Gateway & Normal Phone System.
It is an application that turns any PC into an absolutely free phone line.
Nomadtel dialer allows you to call any land line or mobile phone from your PC.
Salam2Asia2 plugs directly to any broadband connection or analog phone line.