Internet Encyclopedia of Philosophy
Internet Encyclopedia of Philosophy: Heraclitus
Excellent introduction to Heraclitus' difficult philosophy from the Internet Encyclopedia of Philosophy. Includes biography relating him to other Ionian and Milesian philosophers. Quotes several of his fragments.
Able Media
The Asclepion: Medicine in Ancient Greece
Impressive Classics Technology Center site lists the achievements of the ancient Greeks in medicine from the time of Homer up to Hippocrates and the plague of Athens during the Peloponnesian war. Gives evidence from ancient texts.