Khan Academy > Computer Science videos: http://www.khanacademy.org/cs Codeacademy: http://codecademy.com/ Coursera http://coursera.com/ EdX http://edx.org Code.org http://code.org Language-specific: - Ruby Challenges https://interviewstreet.com/ (hiring for Facebook, Microsoft, Quora, Airbnb, Groupon, Spotify, Justin.TV and many others) Misc: |