New best story on Hacker News: Ask HN: Most interesting tech you built for just yourself?

Ask HN: Most interesting tech you built for just yourself?
636 by l2silver | 855 comments on Hacker News.
Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.