qrevo

You can easily insert Google Maps into your posts with this plugin. 
PHP5 required.

Easy Map Creator

Easily insert Google Maps into your posts with this plugin.

prakash.m

Power your site with this WordPress-integrated map making & location management system possessing mapping tools to create store locators, store finders, and other location address maps. Manage and display a few or thousands of your important stores, points of interest, or product locations anywhere on Earth using Google Maps. 
Its strength is best seen in its flexibility to allow you to easily manage any number of locations from your WordPress admin interface and the several addons featuring top-level features that are available to further boost its capabilities. Also referred to as an address map, address location map, locator map, store finder, dealer locator (locater), shop finder. 
mapwidget allow you to search any location from front end. want professional version check <a href="http://magento.ifyouknowit.com" rel="nofollow ugc">Go pro</a>
Example usage: 1. Go to admin mapworks settings and put google map api key of yours 2. in your page/post text/editer put this line: 
 [mapworks stext=”[php] if(isset($_POST[‘smap’])){ echo $_POST[‘smap’];} [/php]”]
<pre><code> in your php page you may put <?php 
 if(function_exists('mapworks') ){ mapworks($_POST['smap']); } ?> 
 <?php 
 if(function_exists('mapworks') ){ 
 print do_shortcode('[mapworks stext="'.$_POST['smap'].'"]'); } ?> 
 best option is in your page/post text editer in admin panel put this line. 
 [mapworks stext="[php] if(isset($_POST['smap'])){ echo $_POST['smap'];} [/php]"] </code></pre>

Mapworks

A WordPress-integrated map & location management interface. Quickly create street locator maps

Easy Map Creator vs Mapworks