Gomix - The easiest way to build the app or bot of your dreams

Microsoft Bot Framework - Framework to build and connect intelligent bots.

Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

ChatBot - Easy to use chatbot platform for business

Hubot - Hubot is a standardized way to share scripts between everyone's robots.