I guess everybody knows Moodle now. Moodle is to Elearning what Mozilla Firefox is to web browsing. Moodle is one of the world's favourite LMS (Learning Management System), i.e a ready-to-use website for learning purposes : students and teachers may login to broadcast or take classes. And it's all free and open source. Its best feature maybe a large community of users helping each others. http://moodle.org/
