iOS/Android: If you're afraid of flying, you might want to skip this one. On the other hand, Prepare For Impact is a useful gaming app for doing something about that fear, as it shows you exactly what to do in various aeroplane-related emergencies.
The app, a 3D game, simulates different emergency situations, from a cabin fire to crashing in the water. To play, you guide your character through the emergency, using the instructions you're given. The goal is to make it out of the emergency unharmed as quickly as possible.
Prepare for Impact was developed by Italy's University of Udine's HCI Lab, and it's a little terrifying, yet informative and useful. You can check it out at the links below.