For anyone looking for a simple markdown editor (nothing more), I would recommend Typora. It's closed source, and the plugin system is lacking, but it gets the essentials basically perfect.
I used to use Typora but something put me off — I can't totally remember what. It might have been that it creates copies of files rather than saving in-place, which then screws up hard links. But it might have been something less 'niche' too!
