FreeRTOS - small footprint, Atmel AVR (MegaAVR) RTOS GCC Port. This page describes the FreeRTOS demo source code project for the Atmel MegaAVR microcontroller.
c - snprintf not working as expected with avr-gcc - Stack Overflow
Using WinAVR and Command Line for AVR Development | Code and Life
avr-gcc 4.9.2 and avr-libc 1.8.1 compiled for Windows | Andys Workshop
AVRSIDE-free alternative IDE for WINAVR - Do It Easy With ScienceProg