Mapquest offers mapping and directional services to businesses, companies and websites. They have very reliable mapping and navigation services, making them one of the leading resource on such application. You can make use of such "apps" on your mobile devices' (like iphone or Blackberry) GPS to navigate yourself (driving directions) in numerous countries and cities. Their MapQuest Wireless feature allows mobile users to make use of their paid voice navigation service while "on the go". On their website, they also offer maps and local & regional searches to find nearby businesses or even restaurants. You can even download their API to make your very own powerful mapping applications. Mapquest is owned by AOL.