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 was annoyed by having to reach for a remote or my phone when watching stuff on my Apple TV, so I made a MacOS Apple TV remote[0] that lives in the menu bar. Saves me literally seconds every day.