MIT OpenCourseWare | Free Online Course Materials (ocw.mit.edu)
MIT OpenCourseWare is an online publication of materials from over 2,500 MIT courses, freely sharing knowledge with learners and educators around the world.
Kolibri : A Free, Open Source Education for All | Learning Equality (learningequality.org)
Lingopolo: Understand spoken language (lingopolo.org)
A language-learning platform that includes themed, bite-sized and unlockable lessons, quizzes and a dictionary. Currently offers Bengali, Croatian, Dutch, French, Hawaiian, Japanese, Pandunia and Thai....