Khan Academy
Free
Khan Academy is a non-profit educational organization.
Udemy
Freemium
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.
Udacity
Commercial
Udacity is a for-profit educational organization offering massive open online courses (MOOCs).
OpenCourseWare Consortium provides opensource cources.
Coursera
Freemium
Coursera works with universities and other organizations to offer online courses, specializations, and degrees in a variety of subjects, such as engineering, …
Wikibooks
Open Source
Wikibooks (Wikimedia Free Textbook Project and Wikimedia-Textbooks) is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of f…
Wikiversity
Open Source
Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of educa…
Compare iTunes U with alternatives
Compare Khan Academy and iTunes U and decide which is most suitable for you.
Compare Wikiversity and iTunes U and decide which is most suitable for you.
Compare OpenCourseWare Consortium and iTunes U and decide which is most suitable for you.