1. BigBlueButton
Open-source virtual classroom designed specifically for teachers
BigBlueButton is a browser-based web conferencing system built purely for online learning. It offers multi-user whiteboards, breakout rooms, shared notes, and integrated polling. Deep native integrations with Moodle, Canvas, and Sakai allow educators to manage sessions directly from their course dashboards.
Pros
- Completely open-source with no software licensing fees
- Purpose-built for pedagogical workflows rather than corporate meetings
- Native LTI integration with leading academic learning management systems
Cons
- Requires self-hosting infrastructure or a third-party managed hosting provider
- Can require significant server resources during high concurrent usage
