Bob Moore

WP Query Engine allows you to perform custom queries using the WP_Query class, using a simple shortcode or Beaver Builder module (requires Beaver Builder).
Supports: 
– Most post data 
– Taxonomy data 
– Meta data
In addition, the plugin offers several exposed filter and action hooks for theme developers to alter the default functionality, including adding additional parameters not specified in the shortcode.
Also includes 3 default templates, including:
<ol>
<li>Default : Standard content wrapped in an article tag</li>
<li>List : Post titles with links in an UL</li>
<li>Genesis Loop : If using a Genesis theme, will output using the Genesis Loop</li>
</ol>
Further, theme developers can easily alter or override the default templates using simple actions and filters, as well as include custom templates easily.
<h4>Using the Plugin</h4>
<ol>
<li>Place the [wp_query] shortcode anywhere withen your content</li>
<li>Use the do_action( ‘wp_query’, $args ); action hook anywhere in your theme</li>
<li>Using the Beaver Builder Module</li>
</ol>
You can see the full documentation and available arguments at <a href="https://docs.wpcodelabs.com/wp-query-engine" rel="nofollow ugc">https://docs.wpcodelabs.com/wp-query-engine</a>
<h3>Notes</h3>
This plugin is provided free, and while I will try to provide support to the best of my ability, I only have so much time to dedicate to supporting a free plugin. If you would like to contribute the this project directly, the main development is done at <a href="https://github.com/WPCodeLabs/WP-Query-Engine" rel="nofollow ugc">GitHub</a>.

WP Query Engine

Tom Auger

This plugin, once activated, spits out the information passed by each filter used in manipulating database queries, as a learning tool.
The code itself is heavily documented and demonstrates best practices for working with those filters and actions to view / manipulate the query.
It is very important to note that this plugin is not meant for a production environment as it will insert a lot of really ugly HTML throughout your page. You’ll get the most use out of this plugin by looking at its code, and maybe previewing one or two pages on a sandbox, vanilla WordPress site.

Valz Display Query Filters

This demonstration plugin identifies the primary filters that are used by WordPress as it parses your queries.

WP Query Engine vs Valz Display Query Filters