Motion.ai - Motion is AI based bot builder enabling users to visually build, train and deploy bots to do just about anything.
Slack App Directory - Your go-to for finding apps that work with Slack
Slack Message Buttons - Making messages more interactive with buttons
BotList - An app store for bots
Dialogflow - Conversational UX Platform. (ex API.ai)
Unapp - A directory of minimal and useful single-purpose apps.