Writer's Cafè - Write a novel or screenplay with Writer's Cafe: a powerful but fun writer's environment that includes the StoryLines structuring tool, a notebook, journal, writing quotations, scrapbook organiser, a 60-page e-book and more.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Manuskript - Open-source tool for writers.
Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers
ChoiceScript - ChoiceScript is a simple programming language for writing multiple-choice games (MCGs) like Choice of the Dragon. Writing games with ChoiceScript is easy and fun, even for authors with no programm…
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.