Great idea. Joplin is a really good note taking app, open source, free and you can easily sync it via webdav. It's not a journaling app per se, but you could u

Great idea. Joplin is a really good note taking app, open source, free and you can easily sync it via webdav. It's not a journaling app per se, but you could use it for that. The mobile apps are not perfect yet though.