Traitorfish
The Tighnahulish Kid
http://academicearth.org/
This looks like a great resource. They have individual lectures and full courses on a range of topics in the sciences, humanities and social sciences. I can't speak for the academic quality of it all, obviously, but given that it's free, I can't see that making a huge difference if you're just pursuing a personal interest.
This looks like a great resource. They have individual lectures and full courses on a range of topics in the sciences, humanities and social sciences. I can't speak for the academic quality of it all, obviously, but given that it's free, I can't see that making a huge difference if you're just pursuing a personal interest.