Cesium RTOS is a full-featured embedded operating system that was originally forked from Micrium µC/OS.
The codebase is strictly developed and maintained by Weston Embedded Solutions.
It features support for TCP/IP, USB-Device, USB-Host, and Modbus, as well as a robust file system.
Micrium OS includes an RTOS kernel, communication stacks, a file system, and graphical user interface that have been relied upon by engineers around the world looking for safe, reliable, and secure operation.
BlackBerry QNX | Embedded OS, Support and Services
BlackBerry QNX offers a broad range of safety-certified and secure software products, complemented by world-class engineering services, to help embedded developers increase reliability, shorten time-to-market and reduce development cost.
Market-leading MIT licensed open source real-time operating system (RTOS) for microcontrollers and microprocessors. Includes IoT and general purpose libraries.