OpenBoard - The OpenBoard software is an interactive white board software.
ClickMeeting - Collaborate with partners and clients using ClickMeeting professional web conferencing software. Try it now, FREE!
Conceptboard - Instant Whiteboards for Teams & Projects
Zoho Cliq - Team chat that's built for work
Scribblar - Scribblar is a free online collaboration tool that is perfect for online tutoring.
GoToWebinar - Webinar & Online Conference | GoToWebinar