Online Courses

Free online courses

Kids

 * https://diy.org/

Basic

 * https://www.khanacademy.org/

College/Uni level

 * https://www.udacity.com/courses (googlish)
 * https://www.coursera.org/courses (aimed at the web)
 * https://www.edx.org/ (Based more on degree courses, heavy going)
 * http://futurelearn.com/ (UK Based, coming soon?)

Courseware from real Uni courses

 * http://ocw.mit.edu/
 * http://www.extension.harvard.edu/open-learning-initiative
 * http://courseware.stanford.edu/

Other

 * http://nescacademy.nasa.gov/ NASA Engineering Online Academy
 * http://alison.com/ bit of a yahoo style directory