IIT Bombay X is a non-profit MOOC platform developed by IIT Bombay using which open source platform?

IIT Bombay X is a non profit MOOC platform built by IIT Bombay on the Open edX open source software.

Joomla is a content management system for websites, not a MOOC delivery platform.

Sakai is a learning management system but is not the base used by IIT Bombay X.

Drupal is another content management framework, again not the MOOC platform here.

Open edX is the open code behind the global edX platform, freely reusable by institutions.

Using it lets IIT Bombay host large open courses with quizzes, videos and certificates.