On the off chance, anyone know where to get an opensource copy of WHO's Anatomical Therapeutic Chemical (ATC) Defined Daily Dose (DDD) guidelines?
The ATC index DDD is copyright protected, so I do not believe one could legally make an open-data version.
You can find information on their licensing on this FAQ page:
http://www.who.int/classifications/help/FAQOther/en/index.html
You can find their copyright statement at: