Nick Haskins

WP Live Search (beta) is a search plugin for WordPress that returns results as the user types for what they are looking. It currently supports posts, pages, post types, including multiple post types, and design modes.
This is very much a working prototype, so please log any issues you find on the Github repo below. 
<a href="https://github.com/bearded-avenger/wp-live-search" rel="nofollow ugc">https://github.com/bearded-avenger/wp-live-search</a>
Here’s some documentation. 
<a href="http://bearded-avenger.github.io/wp-live-search/" rel="nofollow ugc">http://bearded-avenger.github.io/wp-live-search/</a>
Add the shortcode <code>[wp_live_search]</code> to a page or something. There’s a few shortcode attributes that you can use, and are as follows:
type=”” 
Your choices are <code>posts</code> or <code>pages</code>. Defaults to <code>posts</code>. You can also pass <code>type,type</code> to search multiple post types. For example type=”recipes,books”
multi=”” 
By default this is turned off. Set this to true only if you’re using multiple post types above.
placeholder=”” 
The text displayed in the input. Defaults to <code>Search...</code>.
number=”” 
Total search result to return. Default is 20
excerpt=”true” 
Show the excerpt along with the title and featured image (if set)
compact=”true” 
Makes a tiny WP Live Search for use in header widgets and such
dropdown=”true” 
Display search results as a drop-down instead of pushing down the content around it
results=”” 
The text displayed for the results. Defaults to <code>entries found</code>.
results_style=”inside” 
Displays the “entries found” inside of the input area, useful for using in areas like header widgets where space is minimal.
target=”” 
An optional target UL parent to send the search results to. Example <code>target="#someotherdiv"</code>.
Here are a couple examples:
Default Usage: 
 [wp_live_search]
Use in Header Widget: 
 [wp_live_search compact=”true” dropdown=”true” results=”found” results_style=”inside”]
Search through multiple post types: 
 [wp_live_search multi=”true” type=”posts,page”]

WP Live Search

A super light-weight live search plugin that utilizes the WP REST API.

shrimp2t

PressMaximum

<ul>
<li>
PressSEARCH replaces the default WordPress search engine with a powerful search engine that gives the results relevant to the posts. 
That means the visitors will find the most accurate results.
</li>
<li>
PressSEARCH provides a powerful AJAX live search that help visitors search and see the results quickly when they are typing like Google search.
</li>
<li>
PressSEARCH can search through every post types, e.g post, page, or any custom post type. 
You can also control the search results by assigning a greater weight to the data fields.
</li>
<li>
PressSEARCH uses search template in your theme to display the search results.
</li>
<li>
PressSEARCH is packed with a lot of settings, hook actions and filters that allow you to easily extend the plugin’s feature set.
</li>
</ul>
<h3>Features:</h3>
<ul>
<li>Search results sorted in the order of relevance.</li>
<li>Ajax live search. Using theme’s search form.</li>
<li>Work with any search inputs which have the attribute <code>name="s"</code>.</li>
<li>Fuzzy matching: match partial words, if complete words don’t match.</li>
<li>Find documents matching either just one search term (OR query) or require all words to appear (AND query).</li>
<li>Create custom excerpts that show where the hit was made, with the search terms highlighted.</li>
<li>Highlight search terms in the search results.</li>
<li>Search and inndex any custom post types.</li>
<li>Search and index users, tags, categories, custom taxonomies, comments, and custom fields.</li>
<li>Search and index the contents of shortcodes.</li>
<li>Control the search results by assigning a greater weight to the data fields.</li>
<li>Suggestion keywords.</li>
<li>Custom stopwords.</li>
<li>Custom synonyms.</li>
<li>Search result throttling to improve performance on large databases.</li>
<li>Advanced filtering to help hacking the search results the way you want.</li>
</ul>
<h3>Pro features</h3>
<ul>
<li>Advanced search reports.</li>
<li>Multiple engines.</li>
<li>Search logs reports.</li>
<li>Popular searches reports.</li>
<li>No results searches reports.</li>
<li>Redirect automatically to post, page if keywords like exactly post title.</li>
<li>Redirect automatically to url, page if keywords like exactly setting keywords.</li>
</ul>
<h3>Comming soon features</h3>
<ul>
<li>Search for phrases with quotes, for example <code>search phrase</code>.</li>
<li>Support for WPML multi-language plugin and Polylang.</li>
<li>Indexing attachment content (PDF, Office, Open Office).</li>
<li>Search and index user profiles.</li>
<li>Related posts base on post contents.</li>
<li>Support quoted searches (phrases).</li>
<li>Support command searches, e.g: <code>intitle: keyword</code>, <code>author: author name</code>.</li>
<li>Search in attachment and media library.</li>
</ul>

PressSEARCH

A better search engine for WordPress. Quickly and accurately.

WP Live Search vs PressSEARCH