OER Commons (U.S.) - find free courses from top Universities around the country in virtually every topic area.
Coursera (U.S.) - housing thousands of course materials, Courera has a number of different courses taught by well-known professors.
Carnegie Mellon Open Education Initiative (U.S.) - this University has just recently began offering free adaptive-based college online courses. While its selection isn't as large as others, its continuing to develop its collection of free courses.
FutureLearn (U.K.) - this British Open Educational Resource provides a variety of courses in a seemingly countless number of topics for free.
iVersity (Germany) - looking for courses in German or English? Check out Germany's iVersity, an open educational resource stocked with a number of free online courses.
UniMOOC (Spain) - want to learn take classes in Spanish or English? UniMOOC is an open educational resource founded in Spain with some great online courses for free.
Open2Study (Australia) - based out of Australia, Open2Study provides learners with a ton of great collegiate courses for free.
Veduca (Brazil) - would you like to take courses in Portuguese? Look no further than Veduca, which is a free, Brazilian open online educational website filled with a variety of courses.
XuetangX and Ewant (China) - looking to take free college courses in Chinese? XuetangX and Ewant are free open online educational resources offered to people around the world.
Kepler from GenerationRwanda (Rwanda) - is a Rwanda-based MOOC providing educational courses online in French, English, and even a few in Kinyarwanda.
ALISON (Ireland) - is actually considered by some as the first MOOC provider. Check out all the great open educational resources offered by Alison.