FreeRTOS is a real-time operating system kernel designed for embedded systems and IoT devices. It provides advanced scheduling, memory management, and inter-task communication for reliable and efficient execution of real-time tasks. FreeRTOS is open-source and widely used in various industries including automotive, aerospace, medical, and consumer electronics. As a specialized skill, knowledge of FreeRTOS is valuable for professionals working in embedded system development, firmware engineering, and IoT application development.