Discourse

Discourse offers an open source platform for running discussion forums.

Discourse is the 100% open source discussion platform built for the next decade of the Internet. It works as: - a mailing list - a discussion forum - a long-form chat room - What’s different about it? - Discourse is a from-scratch reboot, an attempt to reimagine what a modern Internet discussion - platform should be today, in a world of ubiquitous smartphones, tablets, Facebook, and Twitter.