Chatterino - Chatterino is a chat client for twitch chat.
Conrad Wise - Chat with the biggest brain on the planet!
Chatty - Chat with strangers all around the world in Messenger
botwick - Build your own SMS-based text bot
Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.
Peek by Sensay - Peek into real chats happening in messengers