https://openmeetings.apache.org/ Openmeetings provides video conferencing, instant messaging, white board, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming.
http://meetingwords.com/ MeetingWords is a simple text editor for the web. Your text is saved on the web, and more than one person can edit the same document at the same time. Everybody’s changes are instantly reflected on all screens. Work together on meeting notes, brainstorming sessions, homework, team programming and more!
https://www.wooclap.com A simple solution to interact with your audience during a live conference, a corporate meeting or inside a classroom. Sign up for free.
http://www.pixiclip.com/ Pixiclip is an interactive whiteboard. Upload images, draw sketches, and share replays.