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.
It's not that really interesting but it's something I use daily. I've written a sqlite3 based time tracking tool. I highly inspired by timewarrior, but I wasn't satisfied with it.