AESOP Story Engine - Write stories instead of code
Plot Factory - Online story planner, organizer, and writing application.
Tablo - Apple Music for books
Charahub - Keep track of characters for stories
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
World Scribe - World Scribe is a platform that eases the creation process if novel and allows users to keep track of important elements in their world.