F2C KML feeds
The Form2Content KML feeds extension allows the creation of (multiple) KML feeds of your Joomla (F2C created) articles. A KML feed (or file) is a XML dcument which can be rendered by Googgle Maps (and Earth) to display markers on a map. In this case each marker can link to a Joomla article.
Note: F2C KML feeds creates the KML data, there are several 3rd party solutions which can visualise the data on Google Maps within Joomla.
In this example F2C articles of 1 content type are visualised on a map with coloured markers depending on their category. The Google Maps plugin from Mike Reumer is used for rendering the map.