Woo Custom Empty Price is a WordPress plugin designed for WooCommerce users who want to enhance the presentation of products without set prices. This free plugin allows for complete customization of the empty price HTML on single product pages, enabling users to add a 'CONTACT FOR PRICING' button, advisory text, or any custom HTML content. It provides three flexible content types: a simple text box with styling options, a button with an optional link, and a custom HTML option, catering to various user needs.

The plugin is designed to utilize the styles of the active theme by default, but it also offers configurable CSS classes for additional styling flexibility. It's important to note that the custom content will only appear on variable products when no price is assigned to any variations. To avoid displaying an out of stock message, it is recommended to use this plugin primarily with 'Simple' or 'Grouped' products.