Software
Everything is free. Windows 10 or 11 is required.
For pilots
SkyPilot
The client for Microsoft Flight Simulator 2020 and 2024: network connection, flight plan from the website, messages, nearby controllers.
Download SkyPilotFor controllers
Network-ATC
Radar: EuroScope and .natc sectors, handoffs, SID/STAR, departure and arrival lists, STCA, plugins.
Download Network-ATCVoice
Radio voice is built in
Both programs talk on the radio themselves: nothing else to install. Choose the microphone, speakers and push-to-talk key or joystick button in the settings. You hear stations tuned to your frequencies within radio range; weak signals sound noisy, as on a real VHF radio. The voice server uses UDP port 3782.