> I have never been successful getting any of the UI or drawing libraries to work.

Have you tried jaylib (built on top of raylib)? I have gotten that to work well on macos, linux and windows. :)

> The main http server circlet is MIT licensed, but it is built on top of Mongoose, which is GPL/paid commercial. Something to be aware of if you want to distribute binaries made with this library.

While I haven't used it outside of development, chidi is MIT licensed. :) https://git.sr.ht/~pepe/chidi