This is based on the beautiful Sienna template.
I used widgetkit, uikit (via the atom form the inspiretheme.guys).
Other than that it's plain Gantry5 (I didn't really use particles other than the menu) and plain Joomla.
Agian I found Gantry5 extremly versatile.
So easy to change sections from fullwidth to boxed.
A good looking site and I love that plumb line on right of screen.
Sometimes simple is best, as you have shown.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information