A simple plugin to get google map with multiple markers and each marker can be linked with post (shown as modal or info window).

This plugin supports multiple markers per map! Kudos to yohman for his plugin: http://wordpress.org/extend/plugins/google-maps-v3-shortcode/

Add Multiple Marker gives you feature to add multiple map locations on same map and display it in frontend using shortcode.

Location Click Map plugin is useful to display marker on clicking of location, use shortcode [location_map].

Multiple map marker and filter plugin is useful to display maps on your website posts and pages using shortcode [map_filter], With fully customized icons and settings.

Create google maps directly from your page/post!