Motion.ai - Motion is AI based bot builder enabling users to visually build, train and deploy bots to do just about anything.
botwick - Build your own SMS-based text bot
Slack Message Buttons - Making messages more interactive with buttons
Bot Store - A marketplace for ready-to-customize chatbot templates.
Dialogflow - Conversational UX Platform. (ex API.ai)
Estherbot - Transform your resume into a bot.