Open Course Ware Consortium
- Tracking over 40000 courses from over 70 resources.
- An organisation collating the online courses available from different universities, on different subjects. Definitely worth a look.
- Free online courses. Portal similar to coursera, but not as much variety.
Stanford Engineering Everywhere
- A limited set of online courses from Stanford University
- Personalised education focused towards gaining a specific skillset for the desired role you wish to work in.
- Take the world's best courses, online, for free and get certificates of completion. Really, an amazing initiative.
Big Data University
- Free Courses related to Data Management and Systems. They also provide certificates of completion based on a Final Exam.