Moodle
Moodle is a free online learning management system, providing educators around the world with an open source solution for e-learning that is scalable, customisable and secure with the largest selection of activities available. Moodle is supported by an active network of certified Moodle Partners to assist with integration and an active community of developers, users and supporters. A full-feature, highly flexible learning platform (also known as a Learning Management System or a Virtual Learning Environment), Moodle is currently used in more than 230 countries with more than 70 million users worldwide.