Conrad Wise - Chat with the biggest brain on the planet!
Chatterino - Chatterino is a chat client for twitch chat.
botwick - Build your own SMS-based text bot
Chatty - Chat with strangers all around the world in Messenger
Sensay for Slack - Get advice from a helpful human, now available in Slack.
Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.