“FlightGear is a free, open-source, multi-platform flight simulator.
The source code is licensed under the GPL. FlightGear is available for free download from: http://www.flightgear.org Precompiled versions of FlightGear v0.9.5 are available (or will be soon) for most platforms including Windows, Linux, Sgi, Solaris, and Mac OS X.

Here are a few of the highlights from this release: – A new system to add realistically scheduled air traffic to the FG world. – Audio subsystem is now based on OpenAL. – Support for SDL. – An XML based gui/widget layout system. – Many internal improvements, enhancements, and bug fixes. – Out of the box support for several new joysticks. – Many new, updated, and improved aircraft. – Updated airports with windsocks, towers, and rotating beacons. – Complete rebuild of the world scenery based on SRTM terrain data. – Accurate radio towers for the USA.

You can view the complete summary of the new features, changes, and
bug fixes for this release here: http://www.flightgear.org/version.html This is the biggest, baddest FlightGear release ever! 🙂 Come fly the
open source skies with us.”