I specifically really enjoy using HackMD because you get a naked markdown editor on the left, and the rendered version on the right. I haven't used it for a whi

I specifically really enjoy using HackMD because you get a naked markdown editor on the left, and the rendered version on the right. I haven't used it for a while, so I'm not sure if these features have been added, but at the time I was heavily using HackMD, there was no linting/auto-formatting available in the linter, unfortunately.