100 Terrific Self-Learning Sites to Boost Your Resume
This is a site where you can take college classes for free, you won't get any credits but you will gain the knowledge and best of all it's FREE!
Great stuff.. I have heard that some universities offer both free online courses, and in class courses. You may not get credit, but you can 'audit' the course, which means you get to sit in class for 'free'.
If you are a senior, check for free classes offered to you.
If you are low income, check with the financial aid counselor at your local community or other college, and ask about free grants and financial help. Often, the cost of all books, courses, etc. can be paid for 100% if you qualify.
Apply for a full ride to an online college: