Apache OpenMeetings is an open source web conferencing and groupware platform for running online meetings in the browser. It combines real-time audio/video, chat, whiteboards, and file collaboration with administrative controls for users, rooms, and organizations.

Key Features

Web-based audio/video conferencing with multiple modes (audio+video, audio-only, video-only, picture-only)
WebRTC screen sharing with selectable desktop/window and quality options
Meeting recording with downloadable MP4 output
Multi-whiteboard with drawing tools, document import, and save/restore of whiteboards
In-room file explorer with drag-and-drop, private and room-scoped public storage
User, group, and room management, including multi-organization support
Integrated messaging and contacts, plus meeting planning with calendar invites and secure room links
Polls and voting with result visualization
Backup and restore of user-generated content

Use Cases

Hosting internal team meetings with screen sharing and recordings
Running online classes, workshops, or interviews using whiteboards and document sharing
Providing a self-managed web meeting solution integrated with existing user/group structures

Limitations and Considerations

Requires an external media server component (Kurento) for real-time media streaming features

Apache OpenMeetings is a strong fit for organizations that need a full-featured, browser-based conferencing system plus collaboration tools like whiteboards, file management, and scheduling. It is especially useful when you want centralized control over rooms, users, and recorded content.