Chatterino - Chatterino is a chat client for twitch chat.
Berkanan - Chat with people nearby. Even offline, on an ✈️.
Chatty - Chat with strangers all around the world in Messenger
Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.
Roomvine - Chatrooms for real life venues, neighborhoods and events