Have you used apps like Byword or WriteRoom? They are simple text editors, and the reason they are so popular is that they embrace minimalism and provide a distraction-free environment for getting your writing done.
As a big fan of apps like Evernote that allow you to store and organize notes, I’ve always wished for a note-taking app that took a hint from those kinds of apps. I recently came across such an app, and it’s called Lenote. It’s almost just what I was wanting from a notes app.