Yoke (Android app)

<img src="https://f-droid.org/badge/get-it-on.png" alt="Get it on F-Droid" height="80"> <img src="https://play.google.com/intl/en_us/badges/images/generic/en-play-badge.png" alt="Get it on Google Play" height="80">

Flightgear

See https://github.com/rmst/yoke for more.