This virtual classroom/web meeting application allows you to meet with up to 200 people for free. You can video chat, share your screen, run polls, and present PowerPoint shows.
Online Meeting Channels, Audio Conferencing, Screen Sharing, File Sharing, Webinar and Telepresence Solutions
Limitations: 500 free meeting minutes. Up to 4 people in room.
Create collaborate workspaces that include a wiki-like shared note space, screen sharing, and video chat.
Limitations: 10 people can video chat at the same time. Another 20 people can participate in the conference without video.
Group Collaboration for Learning Teams.
Learning management system that includes video broadcasts, video meetings, text chat, screencasting, polling, and text messaging.