Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
ForumFree - ForumFree allows you to create a forum or a blog in a few simple steps.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Proboards - ProBoards is a host of free forums with customer service.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Disciple - Grow, engage and monetise your community with Disciple community software. Get your own branded community platform on Web, iOS and Android