simavr is a lean, mean and hackable AVR simulator for linux & OSX
AVR Simulator to run Atmel code on desktop pc
AVRtest is an AVR core simulator used for regression testing of avr-gcc and parts of AVR-LibC.
Distributed control system
Yet another simulator for Microchip AVR microcontrollers
Baremetal software drivers, their unit tests, and their sequence diagrams built and flashed using CMake for ATMEGA32 mcu.