rampantlogic

Geopost is a WordPress plugin based on Google Maps that let’s you specify a location for each post and generate an embedded map containing a marker for each post that has been assigned a location. Clicking on these markers will link you to the corresponding post. The map can be inserted into any post or page using the shortcode [geopost]. To set the location for a post, enter a search string in the Geopost metabox in the post’s admin page and press ‘Search’. If a location is recognized, a map will appear for you to confirm the result. Clicking on the marker icon in the editor window map rotates through different color icons.

Geopost

Uses Google Maps API to create a map containing markers for posts based on individually assigned geocoded locations.

JavierMendezPWG

You can configure your locations into a page with shortcode [simplegmaps], you only must add a list of parameters, 
latitud (latitude), longitud (longitude), zoom, tipomapa (TypeMap), titulomarker (Title of the marker), alto (height of div), ancho (width of div).
Example: 
[simplegmaps latitud = “40.430224” longitud = “-2.416992″ zoom=”13″ alto=”300px” ancho=”300px” titulomarker = “Hola Mundo!”]
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SimpleGMaps

Place locations into div using Google Maps V3

Geopost vs SimpleGMaps