CartoView is a free map creation tool from CartoLogic. CartoView allows you to easily create maps using Google Maps, the Google Earth browser plug-in or Openlayers.
If you want to see what you kind of maps you can create with CartoView the site has provided a number of working demos. This example shows a map created with CartoView and data from Flickr, YouTube, Wikipedia, Gowalla and Twitter.
If you browse through the examples on the demo page you will see that CartoView gives the user the ability to customise the look of the created map.