Plot Factory - Online story planner, organizer, and writing application.
Minzel - Minzel is a beautiful and free mindmapping tool built for creatives and gives you the power to...
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
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!
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
MindNet - MindNet is an effective productivity and learning tool that allows you to take notes, write down ideas, learn, brainstorm your mind, and much more in intuitive graphical mind maps.