Launch Drafts, and you can start typing right away—there’s no need to create a new document, think of a title, or leap any other hurdles to getting your thoughts out of your head and into the app. The iPhone version of Drafts offers a clean document view with just a few buttons and the onscreen keyboard; the iPad version adds a couple additional options (more on those in a moment), as well as an additional row of keys above the onscreen keyboard that are useful for formatting links and typing frequently used symbols (including common Markdown and MultiMarkdown notation characters).
via www.macworld.com
I've mentioned Drafts many times. It's my most-used app.