Atomthreads RTOS supports the AVR/ATmega family of microcontrollers using the GCC compiler toolchain.

The AVR port supports all of the standard Atomthreads features found on the Features page. Released under the open and flexible BSD license, it is free for commercial or educational use without restriction.

Full instructions are provided in the README file for running the sample applications and writing your own real time operating system applications for AVR.