Magento

If you want more than just Live Chat you can Try LetsSyncro Live Support. This extension adds image interaction to the traditional Live chat functionality.

You can find the installation guide in the following link: 
Magento Live Chat extension

There is a source which has many free magento themes and extensions. And you can easily find a suitable one: Magento Download

Hi,

There is one Live Chat plugin available in magento marketplace it is free and compatible with magento v 1.6.  Check this --- http://www.magentocommerce.com/magento-connect/olark-live-chat-4598.html

Hope this will help you!!

Thanks

MontyiLoveMage