Online companies can now resell "live chat" (live support) subscription services to their customers. Only a few lines of HTML needed on customer sites to show operator "online/offline" images (which can be customized). Operator console and chat 100% web-based, and can be configured so your domain name appears. Entirely white-label, and no minimum resell price. Your customers can manage their own chats (via your customized operator log-in page) or you can manage their chats for them. Find out more at: http://www.gotlivechat.com/reseller-whitelabel.asp
All resellers can create white labelled chat coding to use on their client sites. The reseller control panel they use allows the creation of this coding, as well as adding operators/domains/customizations/etc. If you wanted to give a free trial to your clients that would be possible, but you'd want to do it as a reseller of our service.