Startups Anonymous - Anonymously ask questions and share stories. AA for Startups
ForumFree - ForumFree allows you to create a forum or a blog in a few simple steps.
Lalo - Lalo is a platform for remembrance.
Proboards - ProBoards is a host of free forums with customer service.
Requstory - Requstory helps you write your user story quickly.
Disciple - Grow, engage and monetise your community with Disciple community software. Get your own branded community platform on Web, iOS and Android