ZenWriter Online is described as 'ZenWriter, an online text editor that cuts out all the distraction and lets you focus on letting your thoughts flow.
It’s a full screen, zen-like program that offers few formatting options but a whole lot of tranquility' and is a Novel Authoring tool in the news & books category. There are more than 10 alternatives to ZenWriter Online for a variety of platforms, including Windows, Mac, iPhone, iPad and Web-based apps. The best ZenWriter Online alternative is Typora. It's not free, so if you're looking for a free alternative, you could try FocusWriter or Pinery. Other great apps like ZenWriter Online are Scrivener, iA Writer, WriteMonkey and Ulysses.