Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
Quest - Quest lets you create sophisticated text-based games, without having to program.
ChatBot - Easy to use chatbot platform for business