Link: http://markedapp.com/ →
I just discovered Marked today. It adds one of the few things I still miss from TextMate to vim, a live preview window for markdown.
Just add this to your
vimrc and you can
<leader>m in any markdown buffer
to see a rendered preview:
autocmd FileType markdown,liquid nnoremap <buffer> <leader>m :silent !open -a Marked.app '%:p'<cr>