WiZiQ - is a place where you can teach and learn using an easy-to-use Virtual Classroom. You are welcome to give private and public live online sessions, teach for free or earn money teaching. As a learner you can attend public sessions on various topics from academics to anything under the sun.
SnapEngage - The private video discussion solution for the enterprise."the perfect collaboration tool enabling virtual teams to communicate effectively through video and across timezones" Timzon is currently in beta and is available for Google apps and Google Gmail users.
TheFlashMeetingProject - Allows a dispersed group of people to meet from anywhere in the world with an internet connection.
Assemblive - makes large group events easy, using VoIP and a 3D environment, directly in a web browser.
Fuze Meeting - is a Web Conferencing tool that allows you to conduct Online Meetings rather than travel to far off places. It's the easiest and most cost-effective way to hold Online Meetings, period.
HootCourse - A HootCourse is an online classroom. And then some. Instead of cumbersome forums or complicated lesson-plan formats, HootCourse uses a combination of the most popular social networks and blogging platforms to provide a new type of online classroom.
LifeSize - a division of Logitech, delivers "high definition video communications products that provide a productive, true-to-life experience".