Developer's description:QOwnNotes makes that possible while also integrating a text editor, notes management capabilities, and the possibility to rely on the Markdown standard when it comes to formatting. QOwnNotes is the open source (GPL) plain-text file markdown note taking application for GNU/Linux, Mac OS X and Windows by Patrizio Bekerle (pbek on GitHub and IRC), that (optionally) works together with the notes application of ownCloud or Nextcloud.
QOwnNotes prompts you for the location that should be used for your notes files. Take into account that the app will create a new Markdown file for each new entry, so make sure to use a separate directory for the app’s database. Within the QOwnNotes main window, you can quickly create new notes, use intuitive buttons to add Markdown markup, and review the output in real time. The QOwnNotes helps you make the text bold or italic, apply a strikethrough effect, add headings, and so on.