Free and simply RTOS for AVR at assembler. So far, the AVR Studio is used as a development environment. The system supports the preemptive and cooperative multitasking modes, semaphores. Use a small amount of memory for tasks.
SimpleAVROS is RTOS designed special for AVR microcontrollers. Supported Compiler - AVR Studio. Language - Assembly. This is RTOS consist of source code. Supported microcontrollers - ATmega48; In the future- ATmega88/168, ATmega164/324/644, AT90usb82/162