Announcing YS Flight (2003)

“YSFLIGHT - The only free flight simulator where anything is possible.”[0]

All YSFlight versions archive (Linux/macOS/Windows): https://ysflight.org/download/

YSFlight users forum: https://forum.ysfhq.com

[0] https://ysflight.org/

[1] https://en.wikipedia.org/wiki/YSFlight