Where can you download NXT-G?

It's Not that possibly, If you buy the Intelligence brick (NXT or NXT-3 (The New Version) It comes with the program, if you like don't have it, contact the seller and explain the problem, but if you just wanna download it for free, it is rarely free online, it's either cracked or Breaked (Meaning it was somehow downloadable from the original state) Hope This Helps :)