Here is a small list of website I find interesting and valuable sources for my hobby, and I attempted to categorize them. For the English version of the site I mainly included sites that are English or multi-language and left out a few that are only relevant if you are resident in Germany. For the full list you can still choose the German version of the site.
Disclaimer: I am in no way responsible for any content on any of the linked websites. Use them at your own risk.
Important note for owners of the linked websites:
If you would like me to change anything, rewrite a phrase in my description, swap out the preview picture or logo or would like me to remove the link entirely please contact me through the e-mail address in my Impressum.