What is viber?
Viber for Desktop lets you send free messages as well as make free calls to other Viber users, on any device and network, in any country! Initially released as a phone app, you can now use it on your Windows and Mac desktops with a Linux version currently in development for 64-bit systems.
For the Viber site:
Viber is a mobile application that allows you to make phone calls and send text messages to all other Viber users for free! Viber is available over WiFi or 3G. Our sound quality is much better than a regular call. Once you and your friends install Viber, you can use it to talk and message as much as you want. Talk, message, and talk and message some more – for free!* You can also call any number that doesn’t have Viber at low rates using ViberOut.
Here is a demo video
wget http://download.cdn.viber.com/cdn/desktop/Linux/Viber.zip unzip Viber.zip cd Viber ./Viber.sh
That’s it, sign in and enjoy using Viber on your Linux computer.