Joplin

Joplin is a versatile note-taking and to-do app that syncs securely across Linux, macOS, Windows, and mobile. Organize notes into notebooks, search, tag, and edit them in Markdown. Import from Evernote or plain Markdown files. Sync with Nextcloud, Dropbox, OneDrive, or Joplin Cloud. Customize with plugins and themes. Available on all major platforms, plus a Web Clipper for Firefox and Chrome.