WhosOn 

WhosOn is a real time log file analyzer. It displays a list of currently active visitors and allows visitors to chat to you. Also includes real time error and exception reporting plus historical reporting via a SQL database.
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Boldchat Operator Client .NET 

Chat with visitors on your web site. Great for sales and customer service chats. See all visitors on your web site. Initiate chats with visitors. Customize your chat window with your logo, colors, etc. Display a chat button showing your availability.
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CustomerReach 

Provide live help on your web site. Monitor web site activity in real-time and invite visitors to chat with you. Increase sales and enhance customer support by providing a live person to chat with visitors while interest is high.
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