AeroSIM RC - Flight Simulator for Remotely Controlled Aircraft. AeroSIM RC was released in 2007 as a radio control simulator for model airplanes and helicopters, before drones were invented. AeroSIM RC was the first simulator to implement multirotor simulation. Since then, we have added training programs, gimbal and camera operation, flight modes, OSD, scenarios, etc.

https://www.aerosimrc.com/