Great Visionary Thinkers by the late Alexander "Sasha" Chisenklo - learn about Albert Einstein, Buckminster Fuller, Joseph Campbell and others.
Lectures on modern European intellectual history - by a history professor in Florida teaching European intellectual history courses.
Scientific American Magazine - lots of interesting information.
The New Scientist - another great scientific site
Visible Earth by Nasa - incredible collection of public domain satellite images.
Space Imaging 'Picture of the Week' archive - breathtaking satellite photos, see the Pyramids and the Grand Canyon from space.
USA Today Hot Sites archive - updated daily.
My cat hates you - watch out!
Daily zen cards - new, free e-cards every day.