WOOF is a powerful, flexible, easy and robust WooCommerce Products Filter Plugin that extends functionality of WooCommerce plugin to allow your site visitors make searching of products by its categories, products attributes, tags, products taxonomies and price.
This ecommerce plugin has a lot of extensions: Taxonomies search STATISTIC module inside, Color, Image, Meta Filter, Search by Text, Search by SKU, Taxonomy Range-slider, Hierarchy drop-down, Labels, On sales checkbox, In stock checkbox, etc …
If you are WP+PHP developer and you want to create something unusual for your project – using WOOF extension API and default extensions as an examples you can create nearly any extensions for the search form and even custom woo-products loop template for your own purposes. Maximum flexibility!