FreeRTOS is the market leading RTOS solution for microcontrollers,
and as such, many manufacturers provide low level drivers and higher
level middleware that is pre-packaged or pre-integrated with FreeRTOS.
Third party packages provide a valuable resource for FreeRTOS users, so here we have started to gather together information on and take the time to describe a subset of the more notable and free offerings.
Below is just a tiny subset of what is available.: