I wish there was a Markdown editor that was also an outliner, to have the power of an outliner but when you are editing markdown files. You would be able to output markdown files, but you could also output OPML files. It would make it easy to work with both formats side by side. It would support yaml frontmatter and have a plugin system so you could add support for different flavors of markdown. It would have an easy to use mobile app. #