This is a group of resources I have either learned something from or thought could become useful in the future.
The Brand Identity
If you use UnoCSS (I use it for quite a few of my projects) it has a fantastic feature which let's you add icons via class names. Each icon is pulled from icones.js.org, a huge collection of open source icons. Alternatively, if you prefer to use icons as components check out unplugin-icons on GitHub.
Designed and Distributed
Open Source Fonts