If you want one program you can use for seamless communication across devices and operating systems, then try Viber. The program allows you to make free calls and send free messages to other users irrespective of the devices, platforms or networks they use. The service works equally well across geographical borders, and you can even make video calls. Viber fully synchronizes your mobile phone with your computer so you do not have to retype contacts. It also allows you to easily transfer your stickers from your cell phone to the computer in a simple three-step process: click, synchronize and send the stickers. With Viber, you can conveniently call your friends and family members on their cell phones right from your computer. The full synchronization also lets you transfer ongoing calls from one device to another. For example, you may start calling from your desktop but switch the call to your phone simply by clicking one button on the computer and tapping a button on your phone. Apart from giving you the ability to make free HD voice and video calls, you can use Viber to send text, sticker, emoticon and photo messages. You can follow public chats from different people, including celebrities and other famous individuals. The program is very user friendly. You just need to download, install it and enter your phone number to start communicating. Please note that you will receive a code for activating the program. Millions of people have been enjoying free Viber messaging and calls on their mobile devices. With Viber for desktop, you can now join the growing community of Viber users across the globe. The desktop app is as simple as its mobile counterpart. The program is compatible with Windows, Mac and Linux operating systems.