coactionos.com
CoActionOSSee CoActionOS in action at fogo.io. CoActionOS is a real-time, embedded operating system for the ARM Cortex-M3 architecture. It features:. Easy-to-learn, POSIX Style API. A multi-tasking, pre-emptive kernel. Filesystems (including peripheral and device level hardware abstraction). A USB user interface with a cross-platform desktop software application and SDK. For support, please submit issues on Github. Under the relevant project. For general inquires, please email contact at coactionos.com.
http://www.coactionos.com/