Twine - Twine is an open-source tool for telling interactive, nonlinear stories.

Commune - Customer communication platform build for Customer Success teams

Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers

Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.

Quest - Quest lets you create sophisticated text-based games, without having to program.

Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.