Lifehacker posted on some of the most unused websites - .edu’s.  In reading their post, I realized that a lot of people I know would really love some of these sites.  So I’m picking and choosing a few for general consumption!

 Art History

I don’t know about you, but a large number of my friends are artists in some form, and also geeks in some form.  And therefore are interested in the geekery of art - or Art History.

University of Michigan - (amusingly labeled as the Mother of all Art  and Art History Links page)
SweetBriar
Concordia University 

Science

Anatomy anyone?  Even complete with nerves…so detailed!
Folk Medicine Database   Whether you are using it for better chances at passing a healing check, or looking for another option to the eight meds prescribed to you in your five minute appointment with the doctor, this is handy!
Printable Sky Charts   For those firelit nights around the campfire.

 History

These links are particularly fascinating and useful (READ: TEACHERS and PARENTS SHOULD CHECK THESE OUT.) No matter what you are teaching, these websites might help you find historical background to provide to your students for …whatever.  I.E., if I’m assigned to read The Great Gatsby, I’d be totally excited (ok, so I’m a geek!) if my teacher showed me some historical photos and other information to help me get a better understanding of the era I’m reading about.

 American Political History Images  All public domain. 
Aural History - Including some links of readings from literature.
Historical Voices - Like the above, but probably more directly useful.

The Rest

Want to go to Hell?  Finally, you get to choose whether Hell or Paradise are for you, with purgatory as a suburb option.
Scratch