Currently I’m using Joplin with Syncthing-backed file system synchronization. I’m pretty pleased with it, as I do like tagging- and Markdown-based systems.
I plan to upgrade to server-based synchronization, but before doing that, however, I wanted to see what other people are using.
Edit: So far I see a slight favor towards Joplin and Logseq, but I totally didn’t expect (and appreciate) getting so many different answers.
I started with this and switched to a gitlab project using issues and wiki. It’s better than bare .md files in my editor but not really a solution I’d advise others to use. Maybe I should have a look at Logseq…