http://hallojs.org/demo/markdown/ http://hallojs.org/demo/markdown/ http://sofish.github.io/pen/ http://sofish.github.io/pen/ https://github.com/bevacqua/woofma

http://hallojs.org/demo/markdown/ http://hallojs.org/demo/markdown/ http://sofish.github.io/pen/ http://sofish.github.io/pen/ https://github.com/bevacqua/woofmark https://github.com/bevacqua/woofmark http://prosemirror.net/demo_markdown.html http://prosemirror.net/demo_markdown.html Haven't seriously used any of those but I'd put my money on ProseMirror as the most principled one.