Aivo - Skyrocket your Customer Service and Sales KPIs with a Chatbot powered by Artificial Intelligence. Give time back to people.
Botlytics - Analytics for your bot
Zendesk Answer Bot - Chatbots
Dialogflow - Conversational UX Platform. (ex API.ai)
Tars - TARS enables users to create chatbots that replaces regular old webforms.
ChatBottle - Chatbots Search Engine