AcademicEarth.org is a non-profit compiling free online courses (MIT, Yale, etc). I've started two and think both are very good: Yale, History of the US civil

AcademicEarth.org is a non-profit compiling free online courses (MIT, Yale, etc). I've started two and think both are very good: Yale, History of the US civil war with prof. David W. Blight and MIT, Physics: Classical Mechanics with prof. Walter Lewin