Yet another map plugin. With a difference. This isn't an over complicated plugin, it simply displays a map and if required directions to the map pin, based on the browser, or more importantly the mobile devices' published location.
Simple to set up, simple to use.
And just to be different, it uses MapQuest open data API, so for high volume sites no risk of Google wanting to charge you for exceeding your quota.
All the details and screen shots are on the Wordpress plugin repository. For free.