edX is a massive open online course (MOOC) provider. It hosts online university-level courses in a wide range of disciplines to a worldwide student body, including some courses at no charge. Developed by EdxOnline
License: Free
edX is a platform that offers structured online courses with a focus on professional development and recognized certifications, ideal for learners seeking formal education. In contrast, Wikibooks provides a free, community-driven resource for self-study on a wide variety of topics, but lacks formal accreditation and structured learning paths.