Using avr-gcc with the Teensy USB development board
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AVR GCC Toolchain - Setup for Windows - TINUSAUR
Develop Atmel AVR software on Linux (Eclipse + AVR-GCC)
Starting Atmel AVR C Programming Tutorial 2 | ermicroblog
C Programming for Microcontrollers : Featuring ATMEL's AVR Butterfly and the FREE WinAVR Compiler by Joe Pardue (2006, Trade Paperback) for sale online | eBay