Paul Tournemaine

This plugin allows you to :
<ul>
<li>Add a location on the map for the post you want to be shown by clicking on the google map on the post edit page</li>
<li>Add the shortcode [googleMappedPosts] on the page in which you want to display your located posts.</li>
</ul>
Here is a list of parameters for the shortcode:
<ul>
<li>height : give the size in pixel (default 500)</li>
<li>nb_post : number of posts shown (default -1 to show all posts)</li>
<li>category : the category name from which you want posts to be displayed (default empty for all category)</li>
<li>desc : show post in a desc order ( older to newer ), set it to false to change the order (default true)</li>
<li>zoom : the google map initial zoom when the page containing the shortcode is loaded (default 10)</li>
</ul>
All parameters are optional

GMappedLocatedPost

This is a WordPress plugin which allows you to localize your posts.

Fengler

This plugin is created to do one thing and one thing only, that is why it is fast and does not affect badly loading speed of your website.
Plugin setup is quick, easy and very intuitive and it does not require Google maps activation key. Google maps activation key is an optional field.
Adding google map to your page never was easer. Just install and activate plugin, go to settings page, zoom in map, drag pin to desired location and hit save. Copy [map] and paste on the the page where you want it to appear.
Width of the Google maps will adjust automatically to the size of the page.
<h3>Arbitrary section</h3>

Magic Google Maps

Add Google maps quickly and easily to your page. Magic Google maps is light weight plugin optimised for speed. Add Google map to your page with [map].

GMappedLocatedPost vs Magic Google Maps