OpenMeetings
From OpenKM Documentation
OpenKM is integrated with [OpenMeetings]. [OpenMeetings] is a free browser-based software that allows you to set up instantly a conference in the Web. You can use your microphone or webcam, share documents on a white board, share your screen or record meetings. It is available as hosted service or you download and install a package on your server with no limitations in usage or users.
In dashboard there's a icon to access meetings:
