? if you know other open source downloadable alternative, let me know.
charritt
Yes, SiteChatter.com is offering a human click alternative for $10 per month. Their application is customizable to the look and feel of your site and web based so your customer support can chat from anywhere. Its not open source, though.
thewitt
phpLiveSupport is very good.
Affordable with no monthly fee and an ASP model if you want to resell.