Arcweave - Arcweave is the first browser based cloud professional tool for game and narrative design.
Novelize - Novelize is an online novel writing app designed to keep authors on track.
Dialogue Designer - An easy to use but powerful tool for creating branching dialogues for games.
Manuskript - Open-source tool for writers.
Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers
BlankPage - Stay motivated to write, and finish your story