dnobo

http://dermatlas.org

Johns Hopkins dermatology atlas.

http://www.granuloma.homestead.com/

Atlas with mostly histology & some gross slides of tuberculosis and sarcoidosis in addition to other granulomatous diseases.

http://tray.dermatology.uiowa.edu/DermImag.htm

One of the oldest and most basic collections of dermatology photos on the internet. Does not include many photos but is high-quality.