I just discovered this 2 days ago and there seems to be good response about it.
https://wordpress.org/plugins/wpforo/ (https://wordpress.org/plugins/wpforo/)
http://wpforo.com/community/ (http://wpforo.com/community/)
You can see my test site here:
http://docskillz.com/wpforo (http://docskillz.com/wpforo)
The forum seems to look and work pretty well and has nice features!
I need to get on this over the weekend. :whistle: