Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
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…
Arcweave - Arcweave is the first browser based cloud professional tool for game and narrative design.
Squiffy - Squiffy is a tool for creating multiple choice interactive fiction.
Dialogue Designer - An easy to use but powerful tool for creating branching dialogues for games.