Great achievement, NuttX belongs to the increasing list of embedded OSes, with FOSS licenses based on MIT and Apache, moving away from GPL.<p>Besides NuttX, we have Zephyr, FreeRTOS, Arm Mbed, Azure RTOS (Eclipse ThreadX), ESP-IDF,...
We have used NuttX for operating both fixed wing and multi-rotor based small UAVs back in 2019 for plantation monitoring.<p>Looking forward to use it for Gyrocopter UAV where it's like a Goldilocks of UAV, longer range than multi-rotor UAV and more maneuverable than fixed wing UAV.