This is a video demonstration of the Raspberry-Pi based home automation system built by Youtuber Sufficiently Advanced (which he clearly is). It performs various tasks when it hears the corresponding ocarina song from Ocarina Of Time (ie Zelda's Lullaby unlocks the front door, the Sun's Song turns on lights, the Bolero Of Fire turns on the heater, The Song Of Storms operates a humidifier, the Minuet Of Forest waters his plants, the Song Of Time announces the current time and weather, Saria's Song locates his phone, Epona's Song unlocks his car door, and The Song Of Healing returns everything to its default state). That's pretty awesome. If there was a retail version of this available for a reasonable price I would buy it. There isn't though, so I'll just have to continue using my old home automation system: yelling at my roommate to do everything. Derek! Turn the heater on, I'm chilly. "You didn't pay the electricity bill, remember?" Well then burn some of your collectibles, that's what I did when you were on vacation. "Wait, what?" I said I'll call the electric company and see if I can pay in installments.
Keep going for the worthwhile video.
Thanks to Seba, who agrees this guy could start his own home automation business and make a killing.