Microsoft Bot Framework - Framework to build and connect intelligent bots.
ChatBot - Easy to use chatbot platform for business
Gomix - The easiest way to build the app or bot of your dreams
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
BotList - An app store for bots
Joonbot - Joonbot is a no-code and intuitive chatbot builder.