Giving your forum an entirely new look and feel is easy — just download one of these great themes! There are even themes for the admin control panel.
Projects in Light

MyBB Default 1.8 theme responsive (css grid)

Flat designed theme. Simple and fast.

Responsive Modern Mybb Themes 1.8.24

Fully responsive, modern & multicolor theme for MyBB 1.8 (Documentation included)

A basic Responsive MyBB theme using Bootstrap 3

Focus is a clean and Elegant Flat MyBB theme which can be used by all sort of community users, one of the cool features of this theme is shrinking header on scroll. Focus MyBB Theme has been tested thoroughly on all browsers.

A flat and simple responsive premium theme for free now!

Flatty - A nice & simplistic flat theme for MyBB.

Classic Blue is remake of a old theme TheTechGame.com used back in 2011. This theme is a nice white and blue theme for almost any type of forum.

eXe is a mobile compatible and desktop mybb theme.Applies to Mybb versions 1.8.X

Responsive and multicolor ACP theme in Flat Design
A nice looking version of defult MyBB theme, created for a Polish Minecraft server board.

Emre KRMN vBulletin default style theme for mybb 1.8.x
This theme is based off of the Wordpress theme Frontier.

My first topic for the MyBB forum.
MT MODERN THEME

Seriforn is a light MyBB theme, which is highly compatible with most of the popular MyBB 1.8.x plugins.

Simple and clean theme with 5 different colours

Dazzle is a MyBB theme that has awesome user menus, easy to customize, and a slick interface your community will love.

Updated version of Audentio GamingJam theme.