Public Hangouts by HangoutSnitch.com
New Released by Adam Guerbuez / HangoutSnitch , October 2013. The only extension that shows all public hangouts that you can join. The extension updates on it's own, showing you an indicator of how many hangouts are active. Simply click on the icon in your Chrome browser and view who is in the hangouts listed then join, comment or even +1 them from the drop down window of the extension.