Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.

Chatterino - Chatterino is a chat client for twitch chat.

Slack - A messaging app for teams who see through the Earth!

Restream Chat - Restream Chat is a versatile software that permits you to streamline multiple chats in one place.

Flow - Stop managing projects from your inbox.

multiChat for Twitch - multiChat for Twitch is an incredible free-to-use chat application that is designed to aid users to have the best possible ad-free Twitch.tv experience right from their mobile devices.