Lumicall is now offering free calls from browser to mobile.
The whole service is powered by free software using open standards.
Various open source projects have made this possible, in particular:
Please come and join us on the mailing list for any of the third-party projects that are involved. Please also join the Free real-time communications list sponsored by the FSF Europe for any general discussion about the future of free communications with free software.
I'll be presenting some of my own work with WebRTC at the WebRTC Conference and Exhibition 2013 in Paris this week. Various other free software developers are also in the program, including Ludovic Dubost from xWiki and Emil Ivov from Jitsi