My request is a standalone program/simulator/game.
As far as I was looking, there is no good Airport Simulation (Tycoonish) Game. Existing ones are crap.
So... what about making an Airport Tycoon, with a great attention to realism, so it would be attractive even to professional flight simmers. Like correct Rwy numbers, name your taxiways... edit single stands.. like adding jetway/s.. managing everything into a great depth. Simply creating your custom airport and making a huge posibilities of customization.