While sites like Coursera and Udacity have been drawing the most attention on the free education front these days, Saylor has largely flown under the radar. Created in 2008, the site offers nearly 250 free courses online, with topics centered on the 10 highest enrollment majors in the U.S. In addition to taking classes, learners can participate in discussion forums (organized by topic), track courses and print transcripts, and may soon even be able to access free textbooks.

Coursea is a social entrepreneurship company that partners with the top universities in the world to offer courses online for anyone to take, for free. Classes offered on Coursera are designed to help you master the material. When you take one of our classes, you will watch lectures taught by world-class professors, learn at your own pace, test your knowledge, and reinforce concepts through interactive exercises. When you join one of our classes, you’ll also join a global community of thousands of students learning alongside you.

Free online courses in Computer Science, Programming, Mathematics, Science, and Entrepreneurship. If you’re a high school student looking to get ahead before going to college, you will have the chance to take college- level courses and become truly college ready. They have options to earn college credit and you will also have a chance to take subjects not offered at your school.

Alison offers free online courses and certification through 400 different courses in 10 different course categories. Launched in 2007, the site helps people from around the world earn certification in topics like legal studies, psychology, health studies, project management, and human resources. All content is free but to get a copy of your certification, you’ll have to shell out about $20.