I grabbed a copy of WriteMonkey a while back and this article re-kindled my love for it. I noticed in the changelog that some things were fixed since then, new plugins and the like. Coupled with Text Editor Everywhere and the preview plugin to check my syntax, I think I may just use WriteMonkey as my main Markdown editor and general writing app.
My only suggestion from previous use is to not go overboard with the plugins. It’s tempting for sure but I noticed a very slight slow-down with the app. Might have been a phantom placebo effect, I suppose. Too many options with all the extra plugins might have given my brain a stunner shot with what to use first.
Best of all, you can donate any amount and get a key for the full version.