Chatterino - Chatterino is a chat client for twitch chat.
Butter - Butter is a newly launched chatting application that focuses more on the privacy of its users.
Chatty - Chat with strangers all around the world in Messenger
Founders at Work - Stories of successful founders
Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.
Kwayet - Team chat & collaboration app, a simple way to Slack