I've created a German site based on Grav, for Grav. It's a site containing guides to different topics on Grav, mostly for beginner and advanced Grav users. I created it so that people who are using Grav from a user base (not system administrator, but creating content) have a resource to search for things they want to do.
Recently, I've separated the site into 2 independent sites, one remains the site with the guides, the other is a demo of a skeleton with a list of components.
Grav Tutorials
Grav Tutorials is the site with the German guides and can be found at tutorials.crabston.ch/grav. There are tutorials from very basic things (like UI of Grav) to very specific topics.
The site is public, and the content can be used by everyone for free. The repo can be found at github.com/Crabston/tutorials.
If you have feedback or would like to have a tutorial posted, feel free to contact me in any way. You are also free to contribute to these tutorials. Just create a PR on GitHub or send me a file containing the content.
Grav Demo
The Grav Demo is an unofficial site demonstrating how Grav can be used and what you can do with it. The site is published at grav.demo.crabston.dev and is the Hadron Skeleton itself, which is a child theme of Quark with some enhancements (see more about it on GitHub). The skeleton aims to have translations for both, English and German.
The site has a page with all the components available in the skeleton and some example pages to show off its features.
I'd be grateful to receive some feedback about it too and if you have a feature request, just ask and eventually, I can implement it.
Final Word
Both sites are under active development (new content & new features) and hopefully will be in the future. Code & content are available on GitHub, so you check the repo if you want to copy a code snippet or need some help with the page layout.
They are aimed to remain German since I come from Switzerland and my main target are German users. Eventually, there will be some exceptions in the future if I think it should be available in English too.
You can share your feedback & ideas here or via a contact channels that works best for you. You are welcome to share these sites and this thread!