Plot Factory - Online story planner, organizer, and writing application.
TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
Minzel - Minzel is a beautiful and free mindmapping tool built for creatives and gives you the power to...
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.