mac address

Contacts Plus is a personal address book application.

A FREE address book program with a much nicer user interface than normal.

Fidg't: Your Social Networking Address Book

Free Windows tool to determine the owner of an IP address or domain hosting

Determine the country by IP address over a range of IP lists

Birthday reminder, data - from Address Book: Outlook (Express) or XML

Determine what country an IP address or hostname originates from.

Edit Web addresses in your Internet Explorer URL/address drop-down menu

Lets you find your IP address, resolve hostnames to IP addresses using the DNS.

Ip2CountryResolver allows you to identify the country by given IP Address.