owencutajar

The GeoWidget plugin displays a map in your sidebar that can be used to show where you live. You can use it to show any point on the map; where you work, where your idol lives or even where you want to go on holiday. The plugin works both as a widget or as a stand-alone component you can add to your sidebar.
Most information at: http://www.u-g-h.com/index.php/wordpress-plugins/wordpress-plugin-geowidget/

Geo Widget

Add a map to your sidebar. Select a map view from your Admin console. Widget friendly. Uses Microsoft Live Maps.

bloomfornews

This plugin provides geotagging capabilities for your content and hyperlocal features for your website and newsletters to enable your readers to search and save locations to recieve personalized experiences. 
Most features require your website to be a local news outlet that is registered on <a href="https://www.bloom.li" title="Bloom" rel="nofollow ugc">Bloom</a>.

Bloom for Publishers

Geotag your posts to enable local search and other hyperlocal experiences for your readers.

Geo Widget vs Bloom for Publishers