Kardnote is described as 'Aims to provide a daily note-taking tool with the power of Markdown. However, Markdown is optional here; it also has an intuitive rich-text editing mode. In this mode, you even don't need to know what Markdown is' and is a Note-taking tool in the office & productivity category. There are more than 25 alternatives to Kardnote for a variety of platforms, including Windows, Android, Mac, Linux and Web-based apps. The best Kardnote alternative is Trilium Notes, which is both free and Open Source. Other great apps like Kardnote are CherryTree, Cryptee, Milanote and FuseBase.