Coursera just blew me away by offering courses that aren't related to computer science! I am definitely looking forward to seeing how those blow over. Udacity doesn't have the funding that Coursera has, but also promises to be great. Udacity, however, is focused solely on computer science education. I believe this is a mistake and free education should be for everyone, not just computer dorks.<p>Also, it's Codecademy, not Code Academy. :)
I like them all. Any gate to education is a gate worth keeping open.<p>(Code Academy is going to really interesting though once more people start submitting courses. REAL interesting.)