Discourse

Discourse is a free, open-source community discussion platform combining long-form forum discussion with real-time chat, moderation and trust levels, themes and plugins, which communities can self-host for full control or take as optional official hosting.

• Open-source alternative to: Facebook Groups, Vanilla Forums
• Licence: GPL-2.0 (Copyleft open source)
• Website: https://www.discourse.org
• Source code: https://github.com/discourse/discourse
• GitHub stars: 48040, forks: 9056
• Topics: forum, community, discussion, online community, self-hosted, discourse, ember, javascript, postgresql, rails, ruby