Papyrus Autor is described as 'A professional word processor, supporting writers in every phase of their book production – planning, wirting, editing and publishing' and is an app in the News & Books category. There are more than 10 alternatives to Papyrus Autor for a variety of platforms, including Windows, Mac, Online / Web-based, iPad and Linux. The best alternative is Manuskript, which is both free and Open Source. Other great apps like Papyrus Autor are Scrivener (Paid), Hemingway Editor (Paid), bibisco (Freemium, Open Source) and Ulysses (Paid).
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.
Ulysses is a text editor for creative writers. Used by bloggers, poets, students and published novelists all over the world, it offers an integrated environment to brainstorm, draft, revise and even submit text on a professional level.
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.
Looking for a suite of tools for writing your book? This is not just a text editor it does so much more. Organise your story using timelines, planning boards and the snowflake tool, all integrated to make writing intuitive and fun.