Popular free messaging and VOIP app Viber is expanding from the iPhone to the desktop with the release of Viber Desktop for PC and Mac. The new desktop app allows users to initiate both video chats and voice calls, much like competing app Skype. Messages sync instantly across all platforms, and the app includes functionality that lets users begin a call on a smartphone and pick it up on a computer. Viber Desktop and the latest versions of the Viber app were designed from the ground up for individuals using Viber on multiple devices, so you can always use the app that's right for you, whether at home, in school, at the office, or on the go. Viber offer