What are you looking for? I don't have anywhere specific in mind, but with hammerspoon I find myself writing lua to write the functionality I want. Which I used to do with Linux. Ideally I'd write up and post it on a blog or github somewhere though.

Personally I'm okay with paying for software (though I do whine about it from time to time). Yeah it should just be built in functionality, but someone devoted their time to building a thing, so I don't begrudge them a couple bucks for it - so long as it's a one-time purchase and not a recurring subscription model for unchanging functionality.