This seems like the proper place to plug my dumb little side project, an actuarial table calculator that I put together with Alpine.js and a lot of poorly written JS. It's my first "app" though, and I'm happy to share it here if anyone else can use it:
I keep it in a pinned tab to help me recontextualize things when I'm stuck in a poorly functioning dopamine loop. If I'm doing something for leisure, I want to really like doing it, not do it as a holding pattern.