Plugins kategorisearre as forum | Side 5 fan 5 | https://fy.wordpress.org

Send notification to the admin email when a new topic posted.

Automatically cross-post your Wordpress posts to MyBB, also contains a 'recent forum topics' widget.

This little plugin automatically set topics status older than a month to resolved.

Adds a button bar to buddypress forum posting textfields

Display Xenforo Node is a WordPress plugin that allows you to show nodes (Category, Forum,…

Neoforum is full-fledged forum engine for Wordpress, including all standard forum functionality.

Integrates Forumial forum software with WordPress using SSO (Single Sign On)

Support Forum for Envato is allows you to set different user permissions for certain threads…

Enables custom forums, questions & answers or niche discussion board. Implements customizable post types for…

Allows you to override the default behavior of bbPress forums, linking them to an external…

Automatically create and link Wordpress posts to a Flarum discussion.