It's a suite of apps developed by one dude. "List of big tech alternatives" sort of implies a wider selection than a single github repo.

That isn't meant as undue criticism of the dev's work, I use his PDF viewer and I tried a couple of his games. They work.

It's just that most of the "Modern-Apps" aren't interesting to me because there are more mature, also independent alternatives that don't rely on a single maintainer.