A platform for community discussion. Free, open and simple.
Highly customizable and modular in what exactly we need.Cons:
Bit of a learning curve while setting up first time. :)
I have used it extensively in Andrew Chen's talk platform: http://talk.andrewchen.co/ and also for Write The Docs forum at http://forum.writethedocs.org/. I think it meets most of the goals of a well structured, well monitored, and custom discussion forum. I like it.
Extremely simple and fast to use.Cons:
I don't think this Discourse needs anything now. It's lovely.
Discourse is easily the best community management tool available currently. It's fast and is simple to use.