If you’re interested in the popular Decaf Theme for Moodle, there’s a beta available to test (this is not for production sites). Get it here: https://moodle.org/plugins/pluginversion.php?id=5851. From Paul Nicholls’ (lead maintainer) announcement,
Although the major Decaf functionality is in place (including a couple of new features that had been requested), there are a couple of things to note:
The Awesomebar is not yet responsive. I have plans for this, but haven’t got it done yet.
What’s new in this version? The responsive edition of the theme still features the standard Decaf options you were familiar with like Awesome Bar, 3-column layout and styles. Learn more about all editions of the theme at https://moodle.org/plugins/view.php?plugin=theme_decaf. Now available for Moodle 2.6, the theme has been downloaded 27,000+ times since it was originally introduced.