Viber.6.4.2.9 Final + Portable
 

Viber for Windows lets you send free messages and make free calls to other Viber users, on any device and network, in any country! Viber syncs your contacts, messages and call history with your mobile device. Download Viber, enter your phone number, and start connecting with your friends.

Best-quality HD voice calls
Video calls
Text, photo and sticker messages
Full sync between your mobile and Windows
Transfer ongoing calls between devices