Versatil Markdown is described as 'hypernotebook built around Markdown/CommonMark, with 1Password integration, HTML/CSS support, syntax highlighting, frictionless keyboard flow, smart drag-n-drop insertion, multiple themes, document aliasing, and more' and is an app in the News & Books category. There are more than 50 alternatives to Versatil Markdown for a variety of platforms, including Windows, Mac, iPhone, Android and iPad. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Microsoft OneNote. Other great apps like Versatil Markdown are Typora (Free), Evernote (Freemium), CherryTree (Free, Open Source) and NoteLedge (Paid).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
A productivity and task management tool appropriate for both individuals and businesses. With Nimbus Note users can create notes and to-do lists, share them with others, and archive important data. Save anything. Access it anywhere. Share with anyone.