NodeBB – Open Source Forum Platform for Modern Web

NodeBB is a better forum platform for the modern web. It’s free and easy to use. NodeBB Forum Software is powered by Node.js and built on either a Redis or MongoDB database. It utilizes web sockets for instant interactions and real-time notifications. NodeBB is compatible down to IE8 and has many modern features out of the box such as social network integration and streaming discussions.

Requirements: Node.js, Redis, nginx
Demo: https://nodebb.org/
License: GPL License