Microchip
Microchip's MPLAB and Microchip Studio IDEs allow you to quickly create microcontroller applications by seamlessly and intelligently integrating FreeRTOS, peripheral drivers, components (displays, flash chips, etc.) and services (file system, USB class drivers, etc.).

Future Designs, Inc.
Future Designs provides application developers with an extensive library of open source software, drivers, and processor support, all under a common framework, and all pre-ported to FreeRTOS.

NXP
NXP's MCUXpresso IDE provides users with everything necessary to get up and running on NXP ARM Cortex-M microcontrollers as quickly as possible during the evaluation and development phases of a project.

STMicroelectronics
ST's STM32Cube and STM32Cube IDE products provide FreeRTOS along with all the drivers and middleware components necessary to get up and running quickly on STM32 ARM Cortex-M microcontrollers.