FacetWP is the best tool to create Amazon.com-style facet search on a WordPress site. Clarity is visual layout builder for FacetWP. It doesn’t require a single line of PHP to use. It’s great for eCommerce sites, and any type of sites that are content heavy, as FacetWP helps get your site visitors to the content they need, quickly and intuitively.
Clarity for FacetWP brings the easy to use admin that you expect from a CalderaWP product to managing FacetWP content. With Clarity you can use a visual layout editor to construct your search interface, that can be displayed with a simple shortcode or as a page template.