Another new theme added to the Moodle themes database earlier this month is Klass which is fully responsive and coded with the latest techniques in HTML5 and CSS3,so it will work on all devices, all browsers, and it does it all seamlessly. Just download and make your e-learn website modern.
You can download the theme from the Moodle plugins database here. If you want to first give it a try then you can check out the live demo here. The theme is supported for all Moodle versions starting Moodle 2.6 onwards.