Viber-for-PC

Viber for Windows lets you send free messages and make free calls to other Viberusers, on any device and network, in any country
Viber syncs your contacts, messages and call history with your mobile device, so you can start the conversation on the Viber mobile application and continue from the comfort of your PC
Best-quality HD voice calls
Video calls
Free text and photo messages
Group conversations
No registration, passwords or invitations required
Contacts and messages sync between your mobile and Windows
Transfer ongoing calls between devices

For    windowswindows

download.cdn.viber.com/cdn/desktop/windows/ViberSetup.exe