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 a Python script which checks the version of every programming language, JDK etc. on my Mac then scrapes the website of each language to compare it with the latest version. Simple but a great time-saver.