I use Obsidian, you have mentioned it and it’s not self hosted, but for me that depends on how you look at it. I use it in a folder that’s synced to Nextcloud, so I consider the data self hosted markdown files. The viewer, i.e. the Obsidian app is not self hosted, but I consider that just a client used to view the data so it doesn’t really bother me.
Also, why does this keep appearing in my feed. Every time I read this aggressive title I’m like jeez…