I understand the question as "editors which are markdown-aware", e.g. syntax highlighting, visual formatting, integrated preview (or interface to a previewer) and stuff like that
@bmike yeah, I was waffling on if to put mavericks in or not. I saw that you had a comment in your edit that took it out, but it was cut off after "Also, it wo..."
@bmike that is not google's support number... did you actually click on the link? I don't know how they got to be the top link on google, but the site is clearly spam
notice that farther down the search links it also claims to be yahoo's customer support number