IP 2 Country
Resolve your visitors IP address with IP 2 country, a little PHP script that resolves the IP address of your visitor to the country they are coming from. You can then personalize your greetings to them or serve them pages was especially created for visitors from that country.
You can use it for some serious webmastering or just for fun like we have done on UK Webmaster World homepage.
You can
download the script from here