Chatterino - Chatterino is a chat client for twitch chat.
Twire - Free and open Twitch browser and stream player
Chatty - Chat with strangers all around the world in Messenger
Xtra - a Twitch player and browser
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.
GNOME Twitch - Enjoy Twitch on your GNU/Linux desktop