A very recent development in the software approach of educational technology is the Massive open online courses that are popularly termed as MOOCs. It can be said as a revolution in the higher education since it has changed the very format of education system in terms of availability of courses, number of learners, flexibility and cost of the course. Every MOOC has the capacity to enrol a very large number of learners. There is no discrimination in terms of educational qualification, options for choice based courses and age limits. They are allowed to have a choice of doing the course at any period of time as per options given and at no cost. Present chapter throws light on the concept, different forms and few existing ongoing MOOCs that can serve as a guideline for the knowledge seekers to add themselves as participants in the ever increasing list.