First, here's a Free 30 Day CSS / HTML Course "...Because we believe everyone has the right to learn how to build wonderful things on the web." (Link provided by muh-li-cah).
Second, if you're up for some reading, here's Over 36,000 free e-books by Project Gutenberg
Third: Miss college? Getting ready for college? Never got a chance to go? Just want to hear some educational lecturing? Here's free courses from:
Dozens and dozens of other schools @ Open Culture
And more here @ Academic Earth (via mehreenkasana)
and 200 more here
United States Institute of Peace
You can also find a lot of these lectures and similar ones at iTunes U.
And tons of free text books (via College worries me)
(Link list complied by quidditchisnotjustagame)