MIT OpenCourseWare is described as 'Since 2001, MIT OpenCourseWare has been creating new opportunities for millions of learners and educators, sharing Open Educational Resources (OER) from MIT and helping to lead a global revolution in free access to knowledge' and is a online education service in the development category. There are more than 25 alternatives to MIT OpenCourseWare, not only websites but also apps for a variety of platforms, including iPhone, Android, iPad and Android Tablet apps. The best MIT OpenCourseWare alternative is Khan Academy, which is free. Other great sites and apps similar to MIT OpenCourseWare are Coursera, Udemy, edX and SkillShare.