The website Classroom 2.0 recently posted an article 9 Web Conferencing Platforms for Education and Collaboration 2.0: What Should Your Organization Use?
In the review, Nicholas Carl Martin wrote about BigBlueButton
It offers the basic features described at the beginning of the post and also employs video conferencing between the presenter and viewers. It lacks recording and mobile integration, but is on a good track and is highly recommended for organizations that have a good handle on tech and want a cost-effective and easy-to-use option.
BigBlueButton 0.8 beta is coming soon!