Storybook is described as 'free, open source novel-writing software for creative writers, novelists and authors which will help you to keep an overview of multiple plot-lines while writing books, novels or other written works' and is an app in the News & Books category. There are more than 25 alternatives to Storybook for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and iPad. The best alternative is Manuskript, which is both free and Open Source. Other great apps like Storybook are Scrivener (Paid), bibisco (Freemium, Open Source), Twine (Free, Open Source) and Gingko (Freemium).
Manuskript is an open-source tool for writers, with outliner, character management, plot development, distraction-free editor, etc. Outliner Organize your thoughts and snippets in a hierarchical manner. Organize them as you wish, reorganize them on the go.
Write and organize your ideas in Gingko tree documents. Whether building a business or writing a bestseller, Gingko lets your ideas flow naturally into place. Write, brainstorm, and organize your document, all in the same flow.
yWriter is a writing tool that uses "scenes" as a unit of text and allows you to associate that text with all manner of story elements (characters, locations, items) as well as place it and rearrange it within the context of chapters.
The Archive of Our Own offers a noncommercial and nonprofit central hosting place for fanworks using open-source archiving software. Archive of Our Own is a project of the Organization for Transformative Works.
FanFiction.Net (often abbreviated as FF.net or FFN) is an automated fan fiction archive site. It was founded in 1998 by Los Angeles computer programmer Xing Li, who also runs the site. As of 2010, FanFiction.Net is the largest and most popular fan fiction website in the world.