Standard Notes is an end-to-end encrypted notes syncing application built for longevity:
Our revolutionary, paradigm-shifting 21st-century business plan is to keep your information ready for the 22nd century. The notes you write now should be there for you in a 100 years. That’s our killer app.
It’s one of the rare times when I value function over form. It’s an ugly application, feeling wholly unnative and lacking in important things like keyboard shortcuts. Why keep using it? There’s no other service that can sync my notes with zero knowledge across devices.
One of the bigger holes–not being able to attach and sync files–is partially filled today with the release of FileSafe:
When you use FileSafe, you attach files[…]to your individual notes. These files are then encrypted by Standard Notes offline (client-side) first, then uploaded in their encrypted form to your Dropbox, Google Drive, or WebDAV compliant server (Nextcloud, ownCloud, Seafile, Synology, and others).
It’s barebones. You can upload to a note and download from a note. There’s no previews, no inlining. It doesn’t work on mobile yet. It’s not what you would expect out of attaching a file to a note.
Privacy is such a strong differentiator.