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.

menelaus35

This widget shows visitor’s location on map.
<h3>Arbitrary section</h3>
More information, you may visit http://eminkura.com

Geolocation Sidebar

This widget shows visitor's location on map.

GMappedLocatedPost vs Geolocation Sidebar