This summer I worked as a intern in a joint project between Saab and Dyno robotics. The goal was to investigate available open source technologies for drone swarm. For the project we used drones from the Swedish company Crazyflie. As for the internship we did high level programming to coordinate the drone swarm and developed software to be able to design a drone-lightshow in the 3d-engine unity and then send commands to the individual drones to perform the show in real life. Programming was split equally between C# and python where C# was for unity and python for crazyflies python API to control the drones via radio.

Here is a video summarizing the project nicely.