It's markdown, open-source, free. With desktop and mobile support.
Syncs notes to any cloud of your choice for free. (I use One Drive)
Optionaly you can pay them to sync your data on their cloud. So they even have a compelling business model!
I wasn't aware of markor and really like it, it seems to handle editing text files really well.
Already use syncthing, so why bother with joplin at all?
But oh well, let's give it a try :D
“Plain text is a powerful universal tool that is almost zero cost, work across platforms, are light enough to work remotely over poor connections, doesn’t go out of date, and is quick to learn.”
Ideally, it'd just sync to webdav and I could use Nextcloud. But I've only ever found a few that did sync with it, and there were always all sorts of weird limitations or bugs in those.
Having a log maybe useful some day, though.
I use Syncthing for all kinds of things and it's excellent, but it's not really a silver for bullet for mutable data like text files.
Need to get my Keepass database on my phone? Syncthing.
Need to back up my reMarkable to my NAS? Syncthing.
Need to replicate game saves between my PC and my Steamdeck because the game doesn't support Steam Cloud Sync (I'm looking at you, Subnautica)? Syncthing.
I run Paperless as a document management system and use Genius Scan on my phone. I use Syncthing to automatically move scans from my phone to the Paperless inbox folder.
And none of that data resides on a third party cloud. Just encrypted, peer-to-peer sync. It really is fantastic.
https://docs.paperless-ngx.com/
Think: replacing paper file folders with a digital system. Supports OCR, a variety of metadata, tagging and categories, etc.
My primary use case is taxes, but for any important legal or financial documents, I throw 'em in Paperless.
Does it run on those?
What I really like about it is that you don't have to sync everything everywhere. I have work folders I sync with just my work machines, and personal ones that go to my personal VPS.
See my reply to your parent commenter.