aerofly-missions
The Aerofly Missionsgerät converts simulator flight plan files for Aerofly FS 4, Microsoft Flight Simulator, X-Plane, GeoFS, and Garmin / Infinite Flight flight plan files. It also imports SimBrief flight plans.
xplane
XPlane data module for Node.js
extplanejs
A JavaScript Client Library for NodeJs that uses the ExtPlane-Plugin