ForumFree - ForumFree allows you to create a forum or a blog in a few simple steps.
Effin Amazing UTM Builder - Add UTM tags to your links from a Chrome Extension
Proboards - ProBoards is a host of free forums with customer service.
UTM.io - Our UTM tool makes it easy and fast to set up tracking on every link, leaving you free to dive into the data to learn how you can maximize the effectiveness of your email and social media campaigns.
Disciple - Grow, engage and monetise your community with Disciple community software. Get your own branded community platform on Web, iOS and Android
UTMBuilder.net - Easiest UTM tags builder