https://joplinapp.org/ https://joplinapp.org/ Open source, uses Markdown, mobile apps, can sync with E2EE multiple ways. They also have a sync service you can

https://joplinapp.org/ https://joplinapp.org/ Open source, uses Markdown, mobile apps, can sync with E2EE multiple ways. They also have a sync service you can pay for, but it's cheap and you can run it yourself if you want. I'm paying $25/yr for syncing.