Here is a list of United Nations and World Bank organizations websites built with Drupal. It is interesting to note that 17 out of the 114 different domains of UN and World Bank organizations use Drupal. That is way more than the penetration of Drupal across all websites. Drupal is known to have an edge over other competitors when it comes to the non profit sector.
Here is a list of websites of United Nations and World bank and their affiliated organizations. United Nations is a big user of Drupal for their websites. We were trying to find out which of the UN websites were using and compiled this list along the way. Thought it would be helpful for others looking to find these websites and sharing it here.