gForums is a WordPress theme that turns your blog into a fully-fledged forum. And you won’t need to rely on other software packages to get up and running with gForums. Whether you want to add a forum to your existing blog or just start a new forum on a brand new domain, gForums has you covered. It contains in root directory of WordPress install and give you the tool to manage your users and let your visitors engage in discussions on your website.

The theme comes with member pages, image slide-show, and report buttons to let you manage your board more effectively. The theme is also pretty light-weight, so it doesn’t put too much pressure on your web server. As you gain members, you may have to increase your resources, but it all depends on how popular your forum gets. Security is always going to be an issue with forum software, but since you are using WordPress to power up your forum, you have plenty of security plugins that you can take advantage of to protect your forum.

For more information visit official site of  gForums.

If you want to allow visitors of you blog to contribute posts, without giving them login information. TDO Mini Forms plugin allow you to add highly customizable forms on you blog. This plugin will allow non-registered users or subscribers to submit posts. Posts submitted by users are kept as “draft” until an admin publish these posts.

The plugin provides an extensive moderation view so administrators and editors can see posts awaiting approval and publish or delete them. Administrators can also ban specific users and IPs from using the form. Registered users have access to a “Your Submissions” page which lists their current submissions awaiting approval and links to their approved submissions as well.

You can get this excellent plugin form here

Now with help of ‘Article Directory WordPress Plugin‘ you can turn your WordPress blog into an article directory. This plug-in is written by Dimox . With this plug-in you can change structure of main page or any other page and also you can change structured list of categories. If you want custom design of article directory, it can be easily customized with CSS. Article Directory WordPress  Plugin have easy to use interface, after implementation of plugin you can make several changes in administrative interface. Usage of plug-in is more convenient for both authors and administrators.

You can get this plugin form  here