MediaInfo MediaInfo provides a great deal of technical and tag information from audio/video files. It features many different layouts to display the information, as well as the ability to create custom layouts as well. Can be used to find missing codecs or just to get all the information you'd need from a multimedia file.

ip2c (ip to country) is a program written to determine the country associated to a specific IP address by querying the five main whois servers responsible for each region of the world and try to automatically establish the most authoritative for the IP specified. Then it return the country's two-letter TLD

CountryCodes is a small database of country codes and additional information for more than 250 countries. It displays their location (continent), ISO 3166-1 Alpha 2-3 codes and ISO number