ForumFree - ForumFree allows you to create a forum or a blog in a few simple steps.
Flare by GoDaddy - Discover, give feedback and support startup ideas
Proboards - ProBoards is a host of free forums with customer service.
Generating Product Ideas - Find ideas for your next business or side project
Disciple - Grow, engage and monetise your community with Disciple community software. Get your own branded community platform on Web, iOS and Android
Little Inventors - Turn children's ideas into reality