Viber, a free call and messaging application, has arrived on BlackBerry in beta form. The app has been available for both iOS and Android for a while and now is finally on the BlackBerry platform as well. The app currently allows for free messaging (text and photo) to other Viber users, but sadly is lacking the calling feature (for now). Viber plans to bring a full release -- including calling -- to BlackBerry "as it meets Viber's quality standards" however. You can grab the beta free in BlackBerry App World.