Geo FS let's you choose from 30 different aircraft and fly across the globe on any device! Yep, Windows, Mac, Linux, and mobile (iOS and Android). It even supports joysticks and has a massive multiplayer lobby. It uses real-world data with ADS-B commercial traffic in real-time and there are navigation charts with 40,000 referenced runways. You can even configure the weather and test your actual pilot skills!