edX is an American massive open online course provider created by Harvard and MIT. It hosts online university-level courses in a wide range of disciplines to a worldwide student body, including some courses at no charge. It also conducts research into learning based on how people use its platform.

Coursera Inc. is a U.S.-based massive open online course provider founded in 2012 by Stanford University computer science professors Andrew Ng and Daphne Koller. Coursera works with universities and other organizations to offer online courses, certifications, and degrees in a variety of subjects.

OER Commons is a public digital library of open educational resources. Explore, create, and collaborate with educators around the world to improve curriculum. OER Commons is a freely accessible online library that allows teachers and others to search and discover open educational resources and other freely available instructional materials.

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. MIT OpenCourseWare continues to build on this foundation. With a new web platform, ever-growing content, and collaborations across the vibrant open education ecosystem, we're creating a world of more equitable and inclusive education for all.