Thanks for the link to Haroopad! I installed it and looks really nice, super easy and fast.
A couple initial downsides...
- I thought Chromium had spell checking, but you don't get it in node-webkit apparently, or it's been disabled. Must have spell check, even poor Chrome spell check.
- Export to HTML - The resulting document doesn't look quite as good in Chrome as exported HTML as it does in the preview pane in the editor; so it's not quite WYSIWYG. There are ways to customize the style of the export, the preview pane itself is HTML... (Export to 'Plain HTML' and put your own .CSS?) But it would be really nice if 'Export as Styled HTML ' got you a matched document at least in Chrome.
- I think word wrap is broken on the editor pane - it should wrap entire words at the end of the line, not cut words in half, right?
Saving documents directly as .md is an interesting trade-off. It's just plain text, which makes things oh so simple. But I'm not sure if this eliminates the possibility for having any non-visible text or meta-data at all inside the document, so that might cut off future features. Not a downside of Haroodpad really, just a consideration for using naked markdown. Most will probably see this as a pro not a con.
FWIW, I am very happy now with:
1. [Haroopad - The Next Document processor based on Markdown](http://pad.haroopress.com/)
2. [mouapp.com](http://mouapp.com/)
Haroopad mainly because it is open source and based on node-webkit and very compatible across platforms.