Openfire is a real time collaboration (RTC) server licensed under the Open Source GPL. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber).
InterCall's Unified Meeting and Cisco WebEx Meeting Center offers secure, reliable audio, web and video conferencing solution by bringing people together as in-person meetings.
InterCall Unified Meeting blends audio, web, and video conferencing into one secure, reliable, proprietary system that integrates with everyday business tools, including instant messaging and calendaring systems. No reservations are required, starting and attending a meeting is as simple as the click of your mouse, and to top it all off, InterCall manages the service for you.
A recent study revealed that 84 percent of IM interactions turn into or are escalated to voice or telephone interactions at least once or twice per week.