slackernrrd

tforssander

swemaniac

jakobneander

This plugin provides search functionality for your WordPress installation, through Google Site Search (aka Google Custom Search). It uses Google’s XML API, and thus requires an account that has access to it (ie you need to pay for it).
The plugin hooks in to the standard WordPress search form, so there is no need to change it (standard search widgets etc will still work). The plugin provides a basic template for the search results, but you can easily make your own if you wish to customize the output.
<ul>
<li>Read more about Google Custom Search here: http://www.google.com/cse/</li>
<li>Read more about the XML API here: https://developers.google.com/custom-search/docs/xml_results</li>
</ul>
This plugin is not developed or endorsed by Google.
<h3>Customizing</h3>
If you wish to customize the search result page, create a template named ‘google-custom-search.php’ in your theme. Refer to the plugin’s ‘default-template.php’ for available template functions. The functions mimic the way that The Loop works, so it should feel familiar.
For advanced users who want even more control of the output of the plugin, it is also possible to transform the response from the XML API with an XSLT style sheet. To do this, create a file called ‘google-custom-search.xsl’ in your theme. Please refer to Google’s documentation for the XML API (https://developers.google.com/custom-search/docs/xml_results) for the format of the response.
If you have a custom search form, you need to change the name-attribute of your search field to “gcs” (ie name=”gcs”) and make sure that the form action is set to the root of your site. Otherwise the search query will not be handled by this plugin.

Google XML Site Search

A search plugin that uses the XML API of Google Site Search (aka Google Custom Search).

Scott (@scottsweb)

Add Google style instant search and search suggest to your WordPress powered site. This plugin will begin displaying search results as soon as your site visitor starts typing into the search box.
The plugin requires very little configuration and should work out of the box with most themes. The plugin has its own options page to configure the plugin to work with your theme if you require it.
<a href="http://scott.ee/" title="WordPress designer and developer" rel="nofollow ugc">a plugin by Scott Evans</a>

Instant Search & Suggest

Instant WordPress search with search suggestions for tags, categories and titles.

Google XML Site Search vs Instant Search & Suggest