Berkanan - Chat with people nearby. Even offline, on an ✈️.
Chatterino - Chatterino is a chat client for twitch chat.
Bubi Chat - Location based anonymous chatting app
Chatty - Chat with strangers all around the world in Messenger
Vuash - Send secret messages safely.
Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.