Aaron D. Campbell

This plugin allows you to easily insert <a href="http://maps.google.com" rel="nofollow ugc">Google 
Maps</a> into your blog, making use of the new shortCode system in WordPress 2.5. 
The maps can be configured to offer directions to or from the location, show or 
hide the zoom/pan controls, show/hide map type (street view, satellite, etc), 
activate zoom using mouse wheel, and more. PHP5 Required.

Google Maps for WordPress

This plugin allows you to easily insert Google

mschwar

Google Maps made Simple by WP-G-Mappity
WPGMappity allows you to easily insert Google Maps into your posts. No XML or JavaScript needed, building a Google Map is done completely in a WYSIWYG form inside your blog.
Versions 0.5 and above use version 3 of the Google Maps API. For you this means:
<ul>
<li>No API key needed</li>
<li>New features</li>
<li>Fast downloads: visitors to your blog only download one extra file from Google – nothing from you.</li>
</ul>
Features include:
<ul>
<li>Markers and custom icons</li>
<li>Routing</li>
<li>Map Controls</li>
<li>Completely customizable size and alignment</li>
</ul>
Project Home, full instructions, and help: <a href="http://matthewschwartz.me/wordpress/wpgmappity/" rel="nofollow ugc">http://matthewschwartz.me/wordpress/wpgmappity/</a>

Google Maps made Simple

Point, Click, Map. Build and insert Google Maps just as easily as you insert images.  All WYSIWYG: no JavaScript, no XML, no coding at all.

Google Maps for WordPress vs Google Maps made Simple