Nimble

This theme was part of the Moodle core distribution, but for Moodle 2.7+ has been moved to Moodle Plugins
Nimble is a two-column, fluid-width theme coded for Moodle 2.0. It makes use of custom menus that appear above the site title on every page. It also includes a basic settings page allowing you to change link color, add a tagline next the site name on the front page, and add text to the footer.