XenForo for CFS may be? We've been using a software called vBulletin for many years for CFS and I've made big investments to support and tweak this software for our needs over the time. vBulletin as a company is not doing well now that it has been acquired by another corporation and they are struggling to keep their old customers. Their software has a lot of bugs and they take too much time to rectify them. Most complaints are that they are not listening. Many forums like CFS are getting affected because of these reasons and more. A few months back, two of their lead developers left them and and recently started a new company based on feedbacks and complaints vBulletin used to receive. End result is a simple and fast vBulletin like software called XeneForo which I am now seriously considering for CFS. It's not out yet, but there is already a huge following for this one. Browse their site here: XenForo Community and let me know what you think.