Simplicity is a free responsive, mobile friendly XenForo style for your forum.
This XenForo theme is simple and free and has been tested with over 60 Xenforo addons.
Features include Google Fonts, FontAwesome Icons and Left or right sidebar.
There are 11, optional background textures, logo Photoshop files and documentation.
Plus there are five preset color layouts: Default Blue, Melon, Rosewood, Cotton Candy, and Teal. Or you can create your own.