Anima App - Design, get feedback, convert to code, publish, iterate.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
BuilderX - Design to code, designers and developers on one platform.
Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers
Monday Hero - Convert design into mobile code 😎
Quest - Quest lets you create sophisticated text-based games, without having to program.