TOAST UI Editor
Markdown WYSIWYG Editor. GFM Standard + Chart & UML Extensible
...Depending on the type of use you want like production of Markdown or maybe just editing the Markdown. The TOAST UI Editor can be helpful for both usages. It offers Markdown mode and WYSIWYG mode, which can be switched any point in time. Today CommonMark is the de-facto Markdown standard. GFM (GitHub Flavored Markdown) is another popular specification based on CommonMark, maintained by GitHub, which is the Markdown mostly used. TOAST UI Editor follows both CommonMark and GFM specifications. Write documents with ease using productive tools provided by TOAST UI Editor and you can easily open the produced document wherever the specifications are supported. ...