We're running a series this week that we call 5x5. Every day for the next 5 days we're going to highlight 5 Joomla sites in a particular category.
Today we're focusing on 5 countries that use Joomla for their official national websites. There are many more such countries, so if know of others, please post in the comments.
Indonesia
Indonesia has the 4th highest population in the world and is the largest economy in Southeast Asia:

Bangladesh
Bangladesh has the 7th highest population in the world:

Latvia
Latvia is a northern European country on the eastern edge of Russia:

Tunisia
Tunisia is great example of Joomla being used for right-to-left languages. Not only the country, but also the country's president uses Joomla (that's a teaser for later this week!)
Tonga
Tonga is another country that uses Joomla for multiple government sites, including the Ministry of Commerce.

