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ChibiOS/RT is a free and efficient RTOS designed for deeply embedded applications. It offers a comprehensive set of kernel primitives and supports many architectures: ARM7, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, ColdFire, H8S, x86.
Low power application-configurable Operating System
langOS is an open-source Operating System for Tiny Scale Devices. It supports platforms based on the MSP430 and AVR microcontrollers and is fully written in C.
langOS aims to be simple, easy to configure and independent of the development host platform. It should be comfortable on Windows, Linux and MacOS platforms.
Nemesis is a tiny real time operating system kernel based on x86 PCs.
Its main purpose is to serve as a simple but realistic example of an real time OS kernel running on real hardware..the purpose of this is that it can be embedded in small devices lik
SimOS is an OS that will be based on the OSKIT function library. In addition we will be maintaining the oskit as a seperate release, updated as the core of the kernel. This OS will be easy to use, with numerous software versions on it.