THe Apache Software foundation, the organization behind open source projects like Apache Webserver, Apache Solr and lots of other open source projects has release Open-Meeting, an open source web conferencing system. It uses Red5 streaming server and boasts of features like
- Audio and Video Conferencing
- Meeting Recording and Screen Sharing
- Multi-White Board and Chat
- User Management, Calendars, Private Messaging
- It also boasts of Moodle and Sakai Integration