Apache OpenMeetings – Video chat, messaging, white board, doc editing and more
It's a bit sad, that even open source projects that are this big, don't have any cohesion of UI.<p>The whole things looks like as if every developer that worked on it just decided to randomly place a button for their feature somewhere. Well... probably that's what happened.<p>Unfortunately, until most OSS looks like this, it'll be very hard for them to gain ground over the commercial alternatives.