Laverna

Markdown Journal is a simple journal that uses Dropbox as back end storage and saves your entries as Markdown files. You are in full control of your journal. All the entries are stored in your personal Dropbox forever. If at some point you decide to stop using Markdown Journal you get to keep all your entries. There is no export function, because your work is always going to be in your Dropbox, as plain text files. You don't need to sign up. If you have a Dropbox account you can hit Write and begin to take notes immediately. If you haven't logged in in a while Markdown Journal will ask to connect with your Dropbox account. A new file is started each month. You can edit any of these files directly with a text editor if you wish. You can delete or rename them at any time. Markdown Journal won't care and will continue working regardless of what you do with the files. When the entry is saved to your Dropbox folder it retains that same Markdown formatting.

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organized into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format. Notes exported from Evernote via .enex files can be imported into Joplin, including the formatted content (which is converted to Markdown), resources (images, attachments, etc.) and complete metadata (geolocation, updated time, created time, etc.). Plain Markdown files can also be imported. The notes can be synchronized with various cloud services including Nextcloud, Dropbox, OneDrive, WebDAV or the file system (for example with a network directory). When synchronising the notes, notebooks, tags and other metadata are saved to plain text files which can be easily inspected, backed up and moved around. The application is available for Windows, Linux, macOS, Android and iOS.