Came across this cool article in Mashable listing 20 fun sites that you can use to learn something new.
Here are few of my additions:
Open Culture Online Courses: The site features a lot of material found on universities’ sites, all in easy-to-browse categories, enabling you to find hundreds of university courses without having to visit and search each university’s site.
Alison: Alison is a free education site offering certification in some areas. Alison offers courses mainly in business, technology, and health, but also includes language learning courses.
It’s a great option if users need a professional certificate for their learning, as Alison also offers school curriculum courses.
MIT OpenCourseWare: MIT offers a variety of free courses. The school has a comparable number of courses to the schools above, and it includes very in-depth course materials on the subjects available. MIT also offers free RSS feeds, a convenient way to continue learning.
I’ll keep updating this list. You can too share sites that you think are fun in learning new things!