CoffeeScript, Flower and Fancy were created using this system(codeproject.com)

http://www.codeproject.com/Articles/286436/Creating-Your-Own-Freaking-Awesome-Programming-Lan

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Direct link to the product: http://createyourproglang.com/

The author also has a live course from time to time covering some of this material and other stuff: http://proglangmasterclass.com/