FreeRTOS - small footprint, Atmel AVR (MegaAVR) RTOS GCC Port. This page describes the FreeRTOS demo source code project for the Atmel MegaAVR microcontroller.
Atmel AVR USB Development System Eta32mini Ver.2 - RAM Electronics
Types of AVR Microcontrollers - ATmega32 & ATmega8, Their Working