World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.

Scrivener - Scrivener is a content-generation tool for composing and structuring documents.

Kanka.io - Kanka.

Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.

Notebook.ai - A smart notebook that grows and collaborates with you

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.