If you are looking for a clean, responsive essentially out-of-the-box ready theme for your Moodle, take a moment and check out the eGuru theme from Nephzat Technologies (aka LMSthemes.com).
They have a live example online here: http://www.lmsthemes.com/eguru-demo
I was particularly happy with the UX and the tools available to customize. Nothing too much, but everything you need to build a great user experience. While you can’t get all the way into a course, you are able to see the functionality of the theme from an inside perspective. I especially like the collapsable table in the course listing to keep everything nicely organized.
You can download the theme here: https://moodle.org/plugins/view/theme_eguru
Are you using the eGuru theme? Let us know your thoughts about it in the comments below.