Microsoft Bot Framework - Framework to build and connect intelligent bots.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Gomix - The easiest way to build the app or bot of your dreams
Message Me - Website to create your contact business card
BotList - An app store for bots
Amazon Lex - Harness the power behind Amazon Alexa for your own conversational apps.