Codecademy is an online interactive platform that offers free coding classes in 12 different programming languages.

Coursera works with universities and other organizations to offer online courses, specializations, and degrees in a variety of subjects, such as engineering, …

Khan Academy is a non-profit educational organization.

Nettuts+ is a popular site aimed at web developers and designers offering tutorials and articles on technologies, skills, and techniques.

Udemy.com is an online learning platform. It is aimed at professional adults who want to add new skills to their resumes, or explore their passions.

CodeCloud.me is a platform for learning programming.

Eureka.in NSES provides educational 2D and 3D content.

Lynda.com is an online education company offering thousands of video courses in software, creative, and business skills.

Udacity is a for-profit educational organization offering massive open online courses (MOOCs).