Summer vacation is here, so download these apps to make your stay that much better. Make free calls among Android, iOS and Windows-based users with Tango Video Calls, and save money on international calls to other Tango members. Use Public Radio On Location Win, a geo-active player that brings up rich stories and music - all related to your current location. Enhance your trip photos with 100 Cameras in 1, an app that adds poetic effects. Stay up to date with all your Mashable news and resources with the new desktop app.