Click 4 Talk http://www.click4talk.com
Offers an online service to talk live with your customers and prospects directly from your web site, email, or ad banner.
Live 2 Support http://www.live2support.com
Live chat support software featuring hits log analysis, real time visitor monitoring, multi-operator, dual interface for monitoring and chatting.
SiteChatter Live Help Solutions http://www.sitechatter.com
Offers services to chat with web site visitors. Push images and web pages directly to their desktop. Unlimited support reps, unlimited chats for the same low monthly fee.