Moodle is a Course Management System (CMS).
http://moodle.org/
Content Management System · Learning Management System
Get access to data on 98,541 websites that are Moodle Customers. We know of 41,221 live websites using Moodle and an additional 57,320 sites that used Moodle historically and 15,119 websites in the United States.
Get a list of 98,541 websites using Moodle which includes location information, hosting data, contact details, 41,221 currently live websites and an additional 30,782 domains that redirect to sites in this list. 57,320 sites that used this technology previously and 15,119 websites in the United States currently using Moodle.