This will allow Administrators to force a username change on a user

Require users to certify their age via a form check stored as a cookie; similar to Jcink's age verification process.

Force specific groups to fill a captcha when posting in specific forums.

Star Wars Galaxies Authentication for MyBB

Restrict the content of posts from guest view in all forums except the ones you choose to keep public. Guests will still be able to see these boards and the thread listing within them but when they open the thread it will give them an error.

Change Author on Edit lets you add to certain usergroups the ability to change the author of a thread upon editing of the first post. It's as simple as it sounds. The plugin adds 1 setting to each usergroup's permissions page.

Allows to limit number of post per hour

This plugin allows you to make your forum closed only to invited users

Converts MyBB into Progressive Web Apps and Accelerated Mobile Pages styles.

Allow administrators to encode URLs within post content.

Display unlocked content list in UserCP and ModCP for the Hide Content and OUGC Lock plugins.