Markdown Editor for Trello alternatives

Caret is a Markdown editor for Mac, Windows and Linux. It stands out with its clean interface, productivity features and obsessive attention to detail.

Abricotine is an open-source markdown editor built for desktop. Write in a clear distraction-free interface or in fullscreen mode. Abricotine supports markdown syntax combined with some GFM enhancements (such as tables). Save document as HTML or copy rich text to paste in your email client. Document content is automatically previewed within the text as you type it. Preview any image or iframe content (such as Youtube videos), math written with LateX, checklists and anchors

Markdit is an online markdown editor. It allows you to write documents or blogs and publish it publicly. With a flavour of server side rendering, the page load is extremely fast. One can create a folder tree to publish a folder of documents.