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.

Alkaweb

Add to your site a top-notch live search field.
Eonet Live Search can be added to any search field. 
It’ll create a nice popup box with the search’s result in real time. It plays very well with Buddypress, Woocommerce 
and any other custom post type. Specific integration can be added by us.
<a href="http://alka-web.com/eonet/live-search/" rel="nofollow ugc">Live Demo</a>
<h4>Featured features:</h4>
<ul>
<li>Options panel</li>
<li>Buddypress Members integration</li>
<li>Buddypress Groups integration</li>
<li>Buddypress Activities integration</li>
<li>Works with any custom post types</li>
<li>Pages / Posts integration</li>
<li>AJAX powered, no page reload</li>
<li>User search history</li>
<li>Options to restrain the search sections</li>
<li>Results listed within organized tabs</li>
</ul>
<h4>For developers:</h4>
<ul>
<li>Hooks/Filters available in all the plugin code</li>
<li>Minified files</li>
<li>Documented code</li>
<li>GPL license</li>
<li>Secure development using tokens and WordPress native functions</li>
</ul>
If you’re looking for a next generation live search plugin, you should give it a go!
We’re open to any feature suggestion.
This plugin has been developed as a side project by the Alkaweb developers team.

Eonet Live Search

It's an useful and pretty flexible plugin!

I like it

Search dynamically in real time through all your site, including pages, posts, members, products & so on.

WP Live Search vs Eonet Live Search