A simple question to this community, what are you self-hosting? It’s probably fun to hear from each-other what services we are running.
Please mention at least the service (e.g. e-mail) and the software (e.g. postfix). Extra bonus points for also mentioning the OS and/or hardware (e.g. Linux Distribution, raspberry pi, etc) you are running on.
Almost everything has been mentioned already so I just stick with the unusual: I host a private MediaWiki instance for note taking in my pen and paper rounds. It’s amazing once the other players got a bit more comfortable how to use it well regarding templates, categories and articles. My only regret is that I didn’t set up new instances per gaming group.