Klaus Zimmermann's Corner

What else should I host in this (not tilde) server?

Now that I got the Raspberry Pi out there and doing some work with the static site, I'm now left wondering what else could I do with it in terms of other services besides websites that I could host on it, hopefully accessible outside of the browser.

I have a previous list of things I have considered, way before even owning a Pi, though their degrees of complexity vary, and some other stuff I recently considered. For example:

What else do you think could be an interesting sevice to host? Let me know on Mastodon!