Here is A list of server known to run flohmarkt

Yes, it still largely works, but the web front end is broken. It works via apps or alternative frontends, for example: https://alexandrite.app/feddit.de

The main admin of feddit.de travelled abroad a few months ago and has since disappeared .

However, many communities have already moved to feddit.org because it is not foreseeable whether feddit.de will work again.

This is how it looked:

github

I would suggest Codeberg: “Codeberg is a collaboration platform providing Git hosting and services for free and open source software, content and projects”