Universidad Quantum is an online teaching portal that offers all kinds of courses for free or for very low fees. Quantum lists quite a few tech courses (such as Moodle for teachers, or the use of QR codes in education) in its roster, but also offers languages (they are currently running a free course to learn Mandarin Chinese), applied psychology, and humanities courses.

Quantum has recently joined Pling and is looking to raise money so they can create more and even more diverse high quality courses.