The Amazing World of Western Civilization:   Ancient Greece --> this is a huge list of every possible link covering every aspect of ancient Greek culture.  
Greece:  Internet Ancient Sourcebook (Fordham Univ.). 
Hellenistic World:  Internet Ancient Sourcebook  (Fordham Univ.). 
The Ancient Greek World --> many great ancient Greek links (especially to social and cultural topics within the site).
Perseus Project Search Engine -- find sites on many ancient Greek topics.
The Ancient Greek World (Univ. of Pennsylvania Museum) -- a great site for many links on Greek history and culture.
The Ancient History Calendar.
Timeline:  Ancient Greece.
An Overview of Archaic & Classical Greek History (The Perseus Project).
Minoan Civilization (The Iraklion Museum, Crete).
The Minoans.
Knossos & Minoan Civilization.
The Mycenaeans.
Homer's Iliad & Odyssey Page (Think Quest project).
Legend of the Trojan War.
Images of the Trojan War Myth.
Everything Spartan, Lakonian, & Messinian -- everything you always wanted to know about ancient Sparta, but were afraid to ask.
Lycurgus' Reforms & Spartan Society.
Spartan Politics.
Gorgo & the Women of Sparta.
Solon:  Athenian Reformer.
The Ancient City of Athens.
The Parthenon.
Government in Classical Greece -- 515-450 BCE.
Law, Crime & Punishment in Ancient Greece.
Pericles:  The Determined Athenian Leader.
Pericles' Citizenship Law.
The Temples of Pericles -- with related links.
Pericles' Funeral Oration -- from Thucydides.
Pericles, the Olympian -- a good short biography.
Democracy & the Age of Pericles.
The Peloponnesian Wars.
The Persian Wars.
The Ancient Olympic Games Virtual Museum (Dartmouth College).
The Ancient Olympics.
Herodotus.
Who Were the Greek Historians?
The "Big 3" Philosophers of Classical Greece --> a good brief bio. on Socrates, Plato, and Aristotle.
The Allegory of the Cave --> Plato.
Philosophers, Scientists, & Theologians of Ancient Greece.
Greek Oracles.
The Mythology Project.
Poseidon's Greek Mythology Page.
Characters of Ancient Greek Mythology.
General Resources for Greek Art.
Greek Art & Architecture.
Greek Sculpture.
Greek Vases & Pottery.
Greek Music.
Ancient Greek Theatre.
Greek Poetry.
Greek Literature.
Everyday Life in Ancient Greece.
The Life of Women in Ancient Greece.
Ancient Scientists.
The Status of Science & Technology in the Hellenistic Age.
Hypatia of Alexandria.
Alexander the Great.
Alexander the Great (I).
Alexander the Great -- a good short biography with additional links.
In the Footsteps of Alexander the Great -- PBS special.
The Alexander the Great Home Page.
Hellenistic Civilization.
Alexandria:  The Ptolemaic Dynasty.