With the unveiling of the BlackBerry 10, users can now use ooVoo, the free voice, video, and text messaging app that has been around for sometime on Android and iOS. The app allows BlackBerry users to fire up HD-quality video and voice calls with friends across different platforms. And, connect with up to twelve different contacts at once. You can do other amazing things with the application as well. Try it out for yourself by clicking on the "Download" button that is displayed near the top of the homepage. ooVoo allows users to send cool video messages, record and upload to YouTube, instant messaging and screen sharing.