Big Blue Button or BBB is an Open-Source conferencing software which can be used for online classes, webinars, meetings, and more.
BBB supports sharing of slides (PDF and any document readable by OpenOffice), webcams, whiteboard, chat, voice over IP (using FreeSWITCH), and presenter's desktop. It can record and playback sessions (slides, audio, and chat), runs on Mac, Unix, and PC computers, and is supported by a community of developers that care about good design and a streamlined user experience.
To join a DEMO MEETING, click here. A new browser window will open.
Screen Capture from BBB interface (Below).