Airtrack allow to create a path between different airports. It is possible to select multiple types of airport: Airports are classified by size (small, medium, large); You can display heliports, and seaplane bases too. Closed airports are also available. Where several airports are displayed, the distance between them is calculated and displayed. You can see all routes departing from an airport. The twitter api allows tweets that are sent from the location of the airport are shown live.