ShoutMix is a Fee shoutbox or tagboard widget, which is an easy to use messaging system that allows you to interact with others instantly. A shoutbox can be placed on your blog or website. Your visitors can then easily post comments in it. They can also use the shoutbox to chat with you and other visitors at the same time. You will be able to customize the sizes, styles, fonts, colors, labels and more when you get your own ShoutMix too. The basic version is Free, however you have to pay in order to upgrade to premium version.

Requirements: -
Demo: http://www.shoutmix.com
License: License Free