Bainternet

Not long a go google implemented an instant search functionallty that show resluts as you type even before you hit the search button. 
With This Plugin you can eaily add instant search functionalty to your site or blog.
Main features:
<ul>
<li>Very easy to install.</li>
<li>Easy configuration screen.</li>
<li>simple options to style the search results.</li>
<li>extendable by hooks and filters all around.</li>
<li>Use as shortcode.</li>
<li>Use as template tag for easy integration with your theme or plugin.</li>
</ul>
any Feedback is Welcome.
check out my <a href="http://en.bainternet.info/category/plugins" rel="nofollow ugc">other plugins</a>

Simple Instant Search

With This Plugin you can  eaily add instant search functionalty to your site or blog.

Sandor Kovacs

Ajax Search is a simple instant posts search widget. In the results shows only published posts.

Ajax Search

Ajax Search is a simple instant posts search widget.

Simple Instant Search vs Ajax Search