PlainText App for iOS
"For editing text on your iPad, iPhone, or iPod Touch. PlainText is a simple text editor with an uncomplicated, paper-like user interface. Unlike the default Notes app, PlainText allows you to create and organize your documents in folders and sync everything with Dropbox.com.
• FOLDERS keep your documents organized.
• PAPER-LIKE INTERFACE keeps the focus on your text.
• DROPBOX SYNC means your documents are always available."
This is a free app