Voip Softphone are today used by billions of people worldwide to communicate with their friends and relatives.Basically Softphone is an application software that simulates the functionality of a phone on a computer.It is used to make phone calls to other phones or computers.Most of the Voip providers offer free PC to PC calls but free PC to phone calls and phone to PC calls are provided by only a few of them. Best Free Voip Softphone Softwares are Listed below. CounterPath's X-Lite CounterPath's X-Lite is the market's leading free SIP based Softphone available for download.Combines voice and video calls, Instant Messaging and provides great interface. Features of X-Lite Softphone Session Initiated Protocol (SIP) based signaling for all interactive media sessions Enhanced Quality of Service (QoS) for voice & video calls Comprehensive Personal Address Book, including detailed calls lists and history Zero-Touch Configuration of your audio or video devices Voice & Video Call Recording ------------------------------------------------------------- Twinkle Softfone Twinkle is a Softphone for your voice over IP and instant messaging communications using the SIP protocol. You can use it for direct IP phone to IP phone communication or in a network using a SIP proxy to route your calls and messages.The twinkle interface is pretty simple and easy to use, with buttons for common actions, a pull down list to choose which connection you want to use for a call, and a input field for typing in the number you would like to call.