Linphone, open-source voip software
What is Linphone ?
Linphone is an internet phone or Voice Over IP phone (VoIP).
- With linphone you can communicate freely with people over the internet, with voice, video, and text instant messaging.
- Linphone makes use of the SIP protocol , an open standard for internet telephony. You can use Linphone with any SIP VoIP operator, including our free SIP audio/video service.
- linphone is free-software (or open-source), you can download and redistribute it freely.
- Linphone is available for desktop computers: Linux, Windows, MacOSX, and for mobile phones: Android, iPhone, Blackberry.
Linphone News :
Bluetooth on iOS !
Thursday 11 April 2013
We released a new version of Linphone for iPhone and iPad that supports Bluetooth. 
Linphone 2.0 for iPhone, iPad and Android
Monday 17 December 2012
The new version V2.0 includes significant enhancements in the new ergonomic shape with a curved face interface, the integration of the address book and an account creation assistant...
New capabilities have been added : a text messaging feature (chat) with delivery status notification, multiple calls and audio conferencing.
Linphone for iPad !
Friday 24 February 2012
We released a new version of linphone for iPhone optimized for the iPad, with improved video quality.
Linphone 3.5.2 for desktop
Wednesday 22 February 2012
This release fixes issues with previously released 3.5.1 binaries.