Campfire Pro
Character design, plot manipulation, and world-building tool for novelists and screenwriters.
19 Alternatives To Campfire Pro
Scrivener
Scrivener is a content-generation tool for composing and structuring documents.
Zim Wiki
Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
yWriter
Free writing software designed by the author of the Hal Spacejock and Hal Junior series. yWriter6 helps you write a book by organising chapters, scenes, characters and locations in an easy-to-use interface.