Orgzly is a completely free and open source note taking and to-do app with an incredible amount of customization and multiple synchronization options including Dropbox, WebDAV, or a directory. On the downside the app does not support image or audio attachments, is not extremely attractive, and is not that easy

A security and privacy first app with end-to-end encrypted sync across devices as part of the free plan, incredible! The flipside is that basic functions like text formatting and checkboxes are an upgrade. I love that it's open source, has 30 days of change history on notes, is available on