GMap module (currently gmap-6.x-1.1-rc1) provides an interface to the Google Maps API within Drupal. It integrates with the Location module to provide users a clickable map for entering latitude and longitude, as well as to display maps of Drupal nodes and users. GMap can be used to create interactive maps with various map markers and content in map bubbles. The module also provides a Views display plugin which allows users to display the results of a view on a Google map.Read more
Founded in 2002, MaxMind is an industry-leading provider of geolocation and online fraud detection tools. MaxMind provides its geolocation technology through the GeoIP brand.
GeoIP is the proprietary technology that drives MaxMind's IP geolocation data and services. GeoIP provides businesses with a non-invasive way to determine geographical and other information about their Internet visitors in real-time. When a person visits your website, GeoIP can determine which country, region, city, postal code, area code the visitor is coming from. Furthermore, GeoIP can provide information such as longitude/latitude, connection speed, ISP, company name, domain name, and whether the IP address is an anonymous proxy or satellite provider.
Location module (currently location-6.x-3.1-rc1) allows admins to collect addresses, geocode them (translate addresses to lattitude/longitude), and associate locations with Drupal nodes and users. Location provides the Location API, handles address storage and geocoding, allows users to attach locations to nodes. Location CCK provides a Location behavior as a CCK field (CCK did not play with Gmap for me).Read more
Mologogo is a free service that will track you and your friends using GPS-enabled mobile phones.