This plugin supports multiple markers per map! Kudos to yohman for his plugin: http://wordpress.org/extend/plugins/google-maps-v3-shortcode/
This plugin makes it easy to add Google Maps to your WordPress post, pages or other custom post types.
Google Maps Master is the professional wordpress plugin to display locations with Google Maps V3.
MapPress is the most popular and easiest way to create great-looking Google Maps and driving directions in your blog.
Add Display Responsive Google Maps in your sites easily by clicking simple button.
Add multiple addresses to a post or page. Addresses will be plotted on a Google Map in your post/page or in the Post Google Map sidebar widget.
This plugin allows you to add one or more maps (via the Google Maps v3 API) to your page/post using shortcodes.
This plugin will show google map in your post or pages with the help of short code then will plugin will place a link and your google map will be view
Last udated: 8/11/2011 This plugin allows you to add one or more maps (via the Google Maps v3 API) to your page/post using shortcodes.
This plugin will embed a google map using shortcode or as a widget. This plugin is a different version of Simple Google Map. It enables to insert maps