It's actually not that easy as peak level (used for normalizing) has little to do with actual loudness. In fact, most programmes and commercials will actually have the same peak levels, but because commercials will hit them more often they will sound louder. Predicting perceived loudness is actually very hard and if an algorithm is standardized and legislated, I'm pretty sure a plugin that routes around it will come out because "louder is better".

Actually Wiring (http://wiring.org.co/) was first, then Arduino took the code to use it on cheaper chips. And Arduino keeps using code from Wiring, even today, without a proper attribution. It's true they stick to Wiring's license, but it would be nice if they let the world know it wasn't their idea.