Moodle is a Course Management System (CMS).
http://moodle.org/
Content Management System · Learning Management System
Get access to data on 94,949 websites that are Moodle Customers. We know of 51,100 live websites using Moodle and an additional 43,849 sites that used Moodle historically and 19,097 websites in the United States.
Get a list of 94,949 websites using Moodle which includes location information, hosting data, contact details, 51,100 currently live websites and an additional 37,991 domains that redirect to sites in this list. 43,849 sites that used this technology previously and 19,097 websites in the United States currently using Moodle.