GRBL

• Grbl is a free, open source, high performance CNC milling controller written in optimized C that will run on a straight Arduino DANK
• Connecting Grbl ATmega168 and ATmega328
• Configuring Grbl here
• Getting Grbl here
• Get source from github

Grbl compiles using the avr-gcc toolchain. On most linux-systems this is availible as a package. On Windows you’ll have the Winavr package.