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.
I wrote my own home automation controller. Recently I wired up a sump pump alarm I can monitor with it. In my car it also logs GPS and speed. It's very badly written though and I recommend against others using it, generally.