Built a utility
Built a PWA
Designed website
Wrote JavaScript
+2
Built an app for automating weight and balance calculations for flying using Next.js. Does all the basic weight-arm-moment things, as well as some more advanced envelope calculation.

As this is primarily designed for iPad, I had to deal with an absurd amount of Safari quirks. I also ended up filing a bug in WebKit for one! One of the main things I took from this project is that Apple is really eccentric.

Right now the presets are hardcoded for the specific planes at the flight school I've been flying at. Eventually I may spend the time to make it more of a portable app with a preset management system, but that would add considerable complexity and might even require an account system.