Coursera
Coursera is one of the leading platforms for online higher education. You can enroll in free courses from all disciplines as well as pay a fee to earn a certificate.
MIT Open Courses:
MIT OpenCourseWare makes the course contents of MIT freely available to everyone. It can enrich the experience of both educators and learners.
Harvard Open Learning Initiative
https://www.extension.harvard.edu/open-learning-initiative
Harvard Extension School brings together the best of Harvard faculty as well as professors from the wider academic community to offer open access courses for higher education. You can get self-paced undergraduate degrees, graduate degrees, and graduate certificates here.
EdX
EdX is a global nonprofit organization offering free online courses in every subject. It reimagines the possibilities of conventional education systems by removing the issues of access, location, and cost.
Stanford Online
https://online.stanford.edu/courses
Stanford Online brings a variety of online courses to help enhance your career and learning from the best minds at Stanford.
Open Culture
http://www.openculture.com/freeonlinecourses
Open Culture centralizes and curates open access higher education courses from various platforms like EdX and Coursera. Here, you can find enriching, educational media from across the web.
Massive Open Online Courses
MOOCs are openly available online courses where anyone can enroll. They offer a self-paced and affordable option to increase your skills and the scope of your career.
Swayam Central
SWAYAM is an educational program developed by the Government of India based on the principles of quality, equity, and access for everyone. The content available here is divided into 4 categories – video lectures, downloadable reading material, self-assessment tests, and a discussion forum.