CodeCanyon - Square Live Chat v1.1.3 | 183 KB
You can learn more about Square Live Chat from the documentation. It is also included in your download.
Square Live Chat can be used as a group chat box, live support system, or any other purposes. It uses text files to store messages and doesn't require a database nor a socket server. It also supports multiple languages and custom themes. You can read more about that from the documentation linked above.
DEMO:
http://codecanyon.net/item/square-live-chat/2994109