I take a look and at chatty which I feel is the best current chat client for twitch TV. I use this client and capture the chat area for an overlay on OBS so that the chat appears on the video on my stream. Shoutout to Fred @oshi7 for showing it to me.
Link – http://getchatty.sourceforge.net
The video shows you how to set up the client and a few things you can do to modify the settings to get it looking perfect.
StreamZ – http://twitch.tv/terrorhertz
Twitter – http://www.twitter.com/terrorhertzhd
Facebook – http://www.facebook.com/terrorhertzhd
Website – http://www.terrorhertz.tv