National Programme on Technology Enhanced Learning (NPTEL)
NPTEL provides E-learning through online Web and Video courses in Engineering, Science and humanities streams. The mission of NPTEL is to enhance the quality of Engineering education in the country by providing free online courseware
A number of lectures from other IITs and IISc Bangalore are also available at NPTEL website (http://nptel.iitm.ac.in). NPTEL Courses
MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.
Coursera online courses
Stanford Online Courses