Keep track of your notes and journalings without giving them to a third party.
Joplin is a free, open-source, and fully-featured note-taking and to-do application which can handle a large number of markdown notes organized into notebooks and tags. It offers end-to-end encryption and can sync through Nextcloud, Dropbox, and more. It also offers easy import from Evernote and plain-text notes.
- Note: As of Dec 2018, Joplin does not support password/pin protection for the application itself or individual notes/notebooks. Data is still encrypted in transit and at sync location using your master key. See open issue.