Louis

This WordPress plugin extends the default search to include meta (custom) fields
Major features in WP Search Include Meta Fields include:
<ul>
<li>No configuration necessary</li>
<li>Integrates with core search functionality</li>
<li>Doesn’t alter the database</li>
</ul>

WP Search Include Meta Fields

License: GPLv2 or later WordPress plugin to extend default search to include meta fields

modemlooper

easymetabuilder

The fastest and easiest way to add meta to WordPress. Easy Meta Builder helps you add custom meta fields to post types without the need for a developer. Add extra fields to user profiles to collect data such as addresses, phone numbers, social media links and more.
Upgrade to <a href="https://easymetabuilder.com" rel="nofollow ugc">Easy Meta Builder Pro</a> and get advanced fields, sliders, and Beaver Builder modules!
<iframe loading="lazy" title="Easy Meta Builder Demo" width="750" height="422" src="https://www.youtube.com/embed/-wpf1Ct8A3I?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
Includes 27 awesome fields!
<ol>
<li>title – a large title (useful for breaking up sections of fields in metabox)</li>
<li>text – a simple text field (large sized)</li>
<li>text small – a simple text field (small sized)</li>
<li>text medium – a simple text field (medium sized)</li>
<li>text email – a text field which enforces an email address</li>
<li>text url – text field which enforces a url</li>
<li>text money – text field with dollar sign in front of it</li>
<li>textarea – a simple textarea (large sized)</li>
<li>textarea small – a simple textarea (small sized)</li>
<li>textarea code – a simple textarea with code formatting</li>
<li>radio – simple radio buttons</li>
<li>select – simple select dropdown</li>
<li>checkbox – a simple checkbox</li>
<li>file – Image/File upload</li>
<li>wysiwyg – TinyMCE editor</li>
<li>text date – Date Picker</li>
<li>text time – Time picker</li>
<li>select timezone – Time zone dropdown</li>
<li>text date timestamp – Date Picker (UNIX timestamp)</li>
<li>text date time timestamp – Text Date/Time Picker Combo (UNIX timestamp)</li>
<li>text date time timestamp timezone – Text Date/Time Picker/Time zone</li>
<li>color picker – Color picker</li>
<li>radio inline – simple inline radio buttons</li>
<li>dashicons radio – radio buttons populated with dash icon icons</li>
<li>taxonomy radio – radio buttons pre-populated with taxonomy terms</li>
<li>taxonomy radio inline – inline radio buttons pre-populated with taxonomy terms</li>
<li>multicheck – A field with multiple checkboxes</li>
</ol>

Easy Meta Builder

The fastest and easiest way to add meta fields to WordPress.

WP Search Include Meta Fields vs Easy Meta Builder