From CUNY Academic Commons
The Drupal Open Source Project was started in 2001, and has a large community surrounding it.
‘Drupal’ comes from the Dutch word “druppel” or water droplet. (Legend has it that the project was originally going to be named drop.org but a typo in the domain application form (“dorp”) led to its final, more appealing name.)
Drupal is immensely popular, and is downloaded over a million times each year. Follow this link to see who is using Drupal.