Remember that in order to use this, the FacetWP plugin installed. The Tour Operator plugin adds settings to enable or disable facets/filters on archive pages.

Testing the wordpress.org translations API

Add an Co-Authors facet to FacetWP

Integrates Meta Box custom fields with FacetWP. Make custom fields filterable.

LSX Search integrates with FacetWP & allows you to easily display search results with filters.