Moodle is a Course Management System (CMS).
http://moodle.org/
Content Management System · Learning Management System
Get access to data on 110,171 websites that are Moodle Customers. We know of 62,466 live websites using Moodle and an additional 47,705 sites that used Moodle historically and 22,747 websites in the United States.
Get a list of 110,171 websites using Moodle which includes location information, hosting data, contact details, 62,466 currently live websites and an additional 50,914 domains that redirect to sites in this list. 47,705 sites that used this technology previously and 22,747 websites in the United States currently using Moodle.