Try these websites for useful information on Greek mythology.
Greek Theatre
Roman Theatre
Apollo
Aphrodite
Athena
Poseidon
Zeus
Demeter
Mt. Olympus
Greek Mythology by
An account that combines mythology with Greek history.
Greek and Roman Mythology A to Z by
This series explores the world's most important myths and legends in an accessible style designed for young readers. Each volume contains more than 400 entries on the major figures, places, stories and themes of a given mythology.
Complete Idiot's Guide to Classical Mythology by
An introduction to Greek and Roman mythology provides explanations of all the gods and their roles, origins of the myths and theories on who wrote them, and the function of myths in society.