I used org-mode for about a year, but then switched to Vim and none of the vim org-mode plugins looked great.

So I thought about what I used it for, and realized it was mostly cycling items between TODO and DONE with a keystroke and text folding.

So I forked vim-markdown and added syntax highlighting for TODO and DONE on header lines, and a mapping to cycle between TODO and DONE. Been using it for a couple of months now and I'm reasonably happy.

If you want to give it a shot, code is here: https://github.com/spatten/vim-markdown