Toyhouse - Toyhouse is a platform that allows users to build up characters foe their games and stories.
Plot Factory - Online story planner, organizer, and writing application.
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
Refsheet.net - Refsheet.
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Notebook.ai - A smart notebook that grows and collaborates with you