Shashikanta

This Plugin insert a location map in your posts/pages using the iFrame based Google Maps without any Api. 
The user can set the exact coords (latutude or longitudes) or insert the location address. If you want to insert a map in a posts you must to generate two personalized fields (called ‘latitude’ and ‘longitude’) with the coordinates or a personalized field called ‘location’ with the address.
This is good for Real Estate type of Blog as shown in the pics and Custom filed type location. It is very lightweight tested in wordpress 3.3.2 version, custom template ready, Google API free.

Quick Location Maps

This Plugin insert a google map in to your posts using the Google Maps Api Free.

Simon Wheatley

Allows authors to set their location, and then display it on a Google Map.
Adds a template tag: <code><?php al_list_authors(); ?></code> with the following available arguments:
<ul>
<li>include_protected_posts=1 : Include protected posts when calculating the latest post.</li>
<li>echo=1 : Whether to write the map and listing into the page, or return it (so you can assign the HTML to a variable).</li>
</ul>
The HTML output is fairly heavily classed, for ease of CSS styling, but if you need to adapt it you can. Create a directory in your theme called “view”, and a directory within that one called “author-listings”. Then copy the template files from <code>view/author-location/</code> in the plugin directory into your theme directory and amend as you need. If these files exist in these directories in your theme they will override the ones in the plugin directory. This is good because it means that when you update the plugin you can simply overwrite the old plugin directory as you haven’t changed any files in it. All hail <a href="http://urbangiraffe.com/" rel="nofollow ugc">John Godley</a> for the code which allows this magic to happen.
Plugin initially produced on behalf of <a href="http://www.puffbox.com" rel="nofollow ugc">Puffbox</a>.
Is this plugin lacking a feature you want? I’m happy to accept offers of feature sponsorship: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a> and we can discuss your ideas.
Any issues: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.

Author Location

Allows authors to set their location, and then display it on a Google Map.

Quick Location Maps vs Author Location