OmPad is described as 'free, simple, powerful, beautiful and minimal writing app that helps you focus and concentrate on writing great content. Format your text with headings, bold, italic, links, images, lists, code and quotes' and is a Word Processor in the News & Books category. There are more than 25 alternatives to OmPad, not only websites but also apps for a variety of platforms, including Mac, Windows, iPad and iPhone. Most alternatives are Word Processors and Text Editors. The best alternative is FocusWriter, which is both free and Open Source. Other great sites and apps similar to OmPad are iA Writer (Paid), WriteMonkey (Freemium), OmmWriter (Paid) and JotterPad (Freemium).
Odyssey is an application designed to force you to focus on writing. It is a simple editor which allows you to configure a time or a word-count goal, and allows you to lock yourself out of any other application until the goal is complete.