Magenta Cuda

This <a href="http://alttypes.wordpress.com/search-types-custom-fields-widget/" rel="nofollow ugc">search widget</a> can search <a href="https://wordpress.org/plugins/types/" rel="ugc">Toolset Types</a> custom posts by the value of Toolset Types custom fields, custom taxonomies and parent/child relationships. It is designed to be used with the Toolset Types plugin and makes use of Toolset Types’ proprietary database format to generate user friendly field names and field values. The widget uses user friendly substitutions for the actual values in the database, e.g. post title is substituted for post id in parent/child fields. The selected posts can be displayed as a standard WordPress list of posts, a spreadsheet of posts with their custom fields or a gallery of featured images.
Version 1.3 supports a <a href="https://alttypes.wordpress.com/#spa" rel="nofollow ugc">single-page application mode</a> where the search results returned by an interactive AJAX request populates a <a href="http://backbonejs.org/" rel="nofollow ugc">Backbone.js</a> collection of models which can be rendered in the same page using <a href="http://underscorejs.org/#template" rel="nofollow ugc">Underscore.js</a> templates and the <a href="http://getbootstrap.com/" rel="nofollow ugc">Bootstrap</a> framework. 
You can view a working sample page using this plugin in single-page application mode at <a href="http://magentacuda.com/demo-of-search-widget-and-wp-rest-server-for-toolset-types/" rel="nofollow ugc">my portfolio website</a>.
<a href="https://alttypes.wordpress.com/#rest-api" rel="nofollow ugc">Version 2.0</a> implements an experimental <a href="http://v2.wp-api.org/" rel="nofollow ugc">WP REST API</a> server for Toolset Types custom post types and custom fields.
Please visit the <a href="http://alttypes.wordpress.com/search-types-custom-fields-widget/" rel="nofollow ugc">online documentation</a> for more details. This plugin works with Toolset Types 2.2.2 and requires at least PHP 5.4. <a href="https://wordpress.org/support/topic/incompatibility-between-my-plugin-and-wpml-multilingual" rel="ugc">This plugin is not compatible with the WordPress Multilingual Plugin by OnTheGoSystems.</a>

Search Widget and WP REST Server for Toolset Types

Search Types custom posts for posts that have user specified values for Types custom fields.

SimonaIlie

Search Simple Fields for WordPress let you add custom fields to be used during the wordpress search.
Search Simple Fields is mainly, an extension for <a href='http://eskapism.se/code-playground/simple-fields/' rel="nofollow ugc">Simple Fields</a> plugin, but not only.
<h4>Features and highlight</h4>
<ul>
<li>choose the post types to be used in search. Easy way to include registered post types</li>
<li>choose the defined Simple Fields to be used in search query</li>
<li>advanced option: choose from Media custom fields. It required programming knowledge: you need to include the name of the function used for the “attachment_fields_to_edit” filter.</li>
<li>to include the set custom fields, add in the active theme function.php file the lines: 
if(!is_admin()) : 
 if(function_exists(‘search_simple_fields_search_posts’)) : 
 search_simple_fields_search_posts(); 
 endif;</li>
</ul>
<h4>Help and Support</h4>
You can find more information about this plugin here: http://elfdreamer.blogspot.com/2011/10/new-wordpress-plugin-search-simple.html

Search Simple Fields

Set custom fields to apply the Wordpress Search on.

Search Widget and WP REST Server for Toolset Types vs Search Simple Fields