Khan Academy
Free
Khan Academy is a non-profit educational organization.
Udacity
Commercial
Udacity is a for-profit educational organization offering massive open online courses (MOOCs).
iTunes U
Free
iTunes U is an educational platform for iTunes.
Coursera
Freemium
Coursera works with universities and other organizations to offer online courses, specializations, and degrees in a variety of subjects, such as engineering, …
Eureka.in NSES
Freemium
Eureka.in NSES provides educational 2D and 3D content.
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Compare Eureka.in NSES and Udemy and decide which is most suitable for you.