I actually prefer QOwnNotes. Its main store is markdown files on disk, unlike Joplins database, which makes syncing easy (at least for me, not separate webdav needed). Obsidian is very nice too, but startup is a bit on the slow side, whereas QOwnNotes is instant.

I've used Zim before, but it has no mobile clients and its custom syntax means I can't just use e.g. any Markdown editor.