openScope Air Traffic Control Simulator

openScope is a free, open source air traffic control simulator that puts you in the controller's seat. Aircraft keep arriving and you are the one issuing the instructions, sequencing approaches and holding safe separation so traffic in your airspace lands and departs in good order. One misjudged call and the picture gets messy fast. The project is community maintained with its source code open, so anyone curious about aviation can also peek at how the thing works underneath. Nothing to download, just open it in your browser and take a shift.