markdown-mode in Emacs is pretty good, but it's not infallible. That said, it's impossible to handle all the dialects simultaneously.
miniblog.
Related Posts
This is my favourite genre of web design: simultaneously advocating for a style and demonstrating why you should/shouldn't use it!
git-worktree allows you to have multiple branches checked out simultaneously!
A debugger should show you the source code of every method in the stack trace, simultaneously: