Forum applications, or message boards differ from chat rooms in that messages are temporarily archived. Forums have a specific set of jargon associated with them; A discussion forum is hierarchical or tree-like in structure. a forum can contain a number of subforums, each of which may have several topics. Within a forum’s topic.
Here are top 5 best and powerful Free Forum Hosting ,if you want create a free forum ,you can have a look !
ProBoards
Project page: http://www.proboards.com/
ProBoards claims to be the largest free forum host on the internet. ProBoards supplies users with customization options so they can design their boards however they like. The application has recently added two iPhone apps as well, one being a free lite version of the full access paid app.
zetaboards
Project page: http://www.proboards.com/
ZetaBoards gives users another way to build an online community or bring an existing community together. Users can create special, joinable groups within their online community on ZetaBoards. The user can access the CSS style sheet as well to customize every aspect of their Zeta message board. The application implements automatic spam protection and provides free support for custom domains.
Lefora
Project page: http://lefora.com/
Lefora is a free forum provision application that provides users with access to customizable forums . On the website, there are featured forums which can givers an idea of the type of forums that may be created through the use of the Lefora application. The application provides a classic forum experience for users and also includes a variety of features including a rich text editor, themes and free space.
FreeForums
Project page: http://www.freeforums.org/
FreeForums Founded in 2007, providing a dependable forum hosting solution to millions of users around the world. The custom admin panel gives you access to hundreds of settings and features, allowing you to customize your free forum for your needs. They give their customers the widest selection of forum mods available.
MoreForum
Project page: http://moreforum.com/
MoreForum strives to be the best free forum host on the market, lets you create and run your own message board. The interface is designed to be user friendly so even a novice computer user can easily set up their own online community through MoreForum. The application makes the process of creating forums easy and also provides automatic spam detection, background images and the ability to upload photos and videos.