Just testing the controls in a heavily modified version of the Unreal Engine 4 starter project for 3D flight. Their version used a simple kinematic flight model, while this is real-time physics based. It's also modified to work with multiplayer correctly, so you can host while playing or with a dedicated server.
Unreal Engine 4 is quite nice to develop with. If you want to get started, take a look here: http://www.unrealengine.com/