ivanra10

This plugin allows to customize the Custom Google Search inside your posts.
You can change language, theme, a search field for every post.
Requires PHP 5.3.x

WP Custom Google Search

A customizable google search plugin for posts.

cleancodenz

This plugin creates custom post type with geo locations for back end data entering, Google Maps Api v3 is used to display geo posts onto a map with clickable markers overlay, geo posts html content then can be displayed in a popup window. 
Without any change this tool can be used to build a store locator or any other location related map application for your wordpress site.
Features:
<ol>
<li>It is using custom post type, no extra table is created</li>
<li>Custom post fields are defined in a config file, easy to change</li>
<li>Built in geo coordinates finder from a location using Google maps api geo service</li>
<li>Marker overlay with customizable text and icon</li>
<li>Popup window is html content which can be entered from admin page with little html knowledge</li>
<li>Categorized geo posts are supported out of box</li>
<li>Categories are used as map legends and customizable</li>
<li>It is using v3 of Google maps api, no key is needed. </li>
<li>Image field with wordpress built in media up loader is supported through meta box 10.All scripts and styles are only exported to the map page. </li>
</ol>
Features only available for premium version:
<ol>
<li>Search based on category</li>
<li>Fast proximity search with km or miles </li>
</ol>
Any issues or need help: <a href="http://www.cleancode.co.nz/contact" rel="nofollow ugc">contact me</a>.

CleanCodeNZ Geo Posts Plugin

Add posts, stores or photos to a map on wordpress page with proximity search(Premium only)

WP Custom Google Search vs CleanCodeNZ Geo Posts Plugin