bigbluebutton.org
Open-source virtual classroom
Web conferencing built for teaching: shared slides with a whiteboard, breakout rooms, polls and recordings, on a server you control.
Free alternative to Zoom
| Resource | Pricing | Type | Licence | Platforms | Popularity | Last commit | Link |
|---|---|---|---|---|---|---|---|
| BigBlueButton | Open source | Tool | LGPL-3.0 | web | ★ 9.2k | 3 Oct 2026 | ✓ |
| Formbricks | Open source | Tool | — | self-hosted | ★ 13k | 3 Oct 2026 | ✓ |
| Plane | Open source | Tool | AGPL-3.0 | web | ★ 60k | 1 Oct 2026 | ✓ |
| Mattermost | Open source | Tool | — | web | ★ 39k | 4 Oct 2026 | ✓ |
| Baserow | Open source | Tool | — | self-hosted | ★ 6.1k | 2 Oct 2026 | ✓ |
| SourcedPress | Free | Service | — | web | ★ 593 | — | ✓ |
| Anytype | Free | Tool | — | self-hosted | ★ 8.9k | 3 Oct 2026 | ✓ |
Open-source surveys and forms
Open-source project tracking
Self-hosted team chat
An open-source Airtable alternative
Open fact-checking workspace for journalists
Local-first, encrypted workspace
