Infobar
Shows an Infobar at the top of the board to guests and users that have not activated their account.

RSS Feed Icons
Adds RSS Feed Icon after forum name.

ProStats
Professional statistics for MyBB

Welcome Guest
Shows a welcome box to guests on index and portal page.

Ajax PM Notification
Checks automatic for new PM in background.

Let me Google
Let Me Google That For You MyCode allows you to use to put and it will provide a link to the search results (with a fancy animation).

Spoiler BBCode
This is a simple Spoiler BB Code that supports Nesting

Board Messages
Allows you to place important messages in your forum header.

Facebook profile link on Postbit 2.2
Add a Facebook button to users posts, and a link to call them

reCAPTCHA III
reCAPTCHA Image Verification for MyBB 1.6 Now with more options.

Simple Audio Video Embeder
An auto embed media plugin that takes links for popular video websites and adds a player directly into the post or mycode area of your website

Fit on Page
Scale down or resize large embeded images so as to avoid the page running over