Is NOAA GFS winds aloft data available for applications? Where can I find the NOAA's winds aloft data in a form that I can use in an application? I plan to develop a software able to calculate the flight path of a lighter than air aircraft or drone using windspeed data from the NOAA Global Forecast System.
See the following web page:

http://www.nws.noaa.gov/tg/general.php

This page describes getting started with the HTTP or FTP access to NOAA weather service APIs.