This category is closely related to the "Pseudoscience & the Occult" category, so much so that they should probably be considered two aspects of the same subject. Although there is a lot of overlap, the websites in this category focus mainly on the academic and historical aspects of their subject, and often leave out the speculation or mysticism aspects.
Title: Encyclopedia Mythica
Notes: The best source for mythological information on the web. Informative articles from mythologies all over the world.
Title: Mything Links
Notes: A massive link list to mythologies, fairy tales, and folklore from around the world.
Title: Living Myths
Notes: Resource for Greek, Celtic, Native American, and Chinese mythologies.
Title: Timeless Myths
Notes: Contains articles and myths from Norse, Celtic, Classical Greek & Roman mythology, and Arthurian legend.
Title: God Checker
Notes: An informative, yet tongue-in-cheek approach to religion and mythology. Wonderfully and cleverly written articles.
Title: BeliefNet
Notes: An online database detailing the world’s major religions, including some information on some of the lesser-known faiths.
Title: Religious Tolerance.org
Notes: Articles and essays on a wide variety of religions.
Title: Electronic Texts of Folklore and Mythology
Notes: Huge collection of folktales from a wide variety of cultures.
Title: Mythology, Folktale, and Fairy Tale Resources
Notes: A long link list detailing folktales and mythology stories around the world.
Title: Library of Congress – Beginnings
Notes: An online exhibit detailing the creation myths of various cultures around the world.
Title: Wikipedia - Mythology category
Title: Biography.ms – Religion
Notes: A detailed article on the concept and nature of religion.
Title: Wikipedia - Religious faiths, traditions, and movements
Title: Biography.ms – List of Deities
Notes: By no means an exhaustive list.
Title: The Golden Bough
Notes: An online version of the landmark mythology book "The Golden Bough", by James George Frazer. Anyone who wants to do serious research on mythology needs to put this book on the top of their list.
Title: Bulfinch’s Mythology – The Age of Fable
Notes: An online version of Thomas Bulfinch’s classical mythology book, "The Age of Fable". It focuses on Greek mythology.
Title: Classical Myth - The Ancient Sources
Notes: A collection of articles and myths regarding classical Greek mythology.
Title: Ancient Egypt - The Mythology
Notes: An in-depth look at the Egyptian pantheon, mythology, and symbols.
Title: Egyptian Mythology
Notes: A brief introduction to the gods and goddesses of Egyptian mythology.
Title: Introduction to Egyptology – Brief Biographies of Egyptian Gods
Title: Gateways to Babylon
Notes: A guide to the myths, magic, and religion of ancient Mesopotamia.
Title: Folktales from Japan
Title: Chinese Myths and More
Notes: A link list to a collection of Chinese myths and folktales.
Title: Gods of the Ancient Mexicans
Notes: Brief overview of the gods of the Aztecs and Toltecs.
Title: Mystery of the Maya
Notes: An introduction to the culture, religion, mythology, and astronomy of the Maya people.
Title: Mayan Mythology Page
Notes: A brief overview of Mayan mythology and culture.
Title: Indigenous Australia
Notes: Contains mythological stories and information on the culture of the indigenous peoples of Australia.
Title: Aboriginal Dreamtime and its Stories
Notes: A collection of mythology stories from the Kimberly region of Western Australia.
Title: Inuit Constellations & Legends
Notes: It is a .PDF file. It could also fit in Astronomy, but the majority of its information is mythological in nature.
Title: Norse Mythology
Notes: Contains basic information regarding the gods and personages of Norse mythology and the culture from which they came.
Title: Norse Mythology Page
Notes: Contains a genealogy of the Norse pantheon, brief descriptions of the gods and goddesses, and a collection of myths regarding them.
Title: DeDanaan
Notes: Contains detailed information on Celtic mythology and folklore.
Title: Animal Symbolism in Celtic Mythology
Title: Arthurian Legend
Notes: Detailed information and analysis about Arthurian legend.
Title: The Camelot Project
Notes: Contains Arthurian legend texts, information, images, and other resources.
Title: Arthurian Resources
Notes: Resources and analysis of the Arthurian legend.
Title: Arthurian Legends Illustrated
Notes: A large collection of photographs of art and locations relating to Arthurian legend.
Title: Angelology
Notes: Information on angels and the heavens they occupy.
Title: Angels & Demons
Notes: A lot of information on angels and demons organized into large tables.
Title: Biography.ms – Demon
Notes: An in-depth article on demons and the roles that they play in various cultures.
Title: Delirium’s Realm - List of Demons
Title: Patron Saints Index
Notes: A comprehensive list of Catholic patron saints, with short biographies.
Title: Catholic Online - Saints and Angels
Notes: Contains information on saints and angels, as well as information on the stigmata, feast days, and other components of Catholic practice and mythology.
Title: Judaism 101
Notes: Thoughtful compilation of information regarding all aspects of Judaism.
Title: Islam 101
Notes: Detailed introductory information on Islam.
Title: Islam Guide
Notes: Another introductory guide to understanding Islam.
Title: A Tribute to Hinduism
Note: A wide variety of information regarding Hinduism and Indian mythology.
Title: Hinduism – A Perspective
Notes: A good introduction to the Hindu faith.
Title: Sanatan Society
Notes: A large collection of information regarding Indian mythology, Hinduism, Vedic astrology, yoga, and many other related topics.
Title: A View on Buddhism
Notes: Contains a large amount of information regarding the philosophy and religion of Buddhism.
Title: BuddhaNet - Buddhist information center
Notes: It takes a bit of poking around, but a lot of information on Buddhism, its culture, mythology, and practices can be found here.
Title: Panlatrevo
Notes: Online resource for Taoism.
Title: Biography.ms - Death (Personification)
Notes: An article detailing the role of death as a being in mythology and religion.
Title: The Resurrection in Mythological Context
Notes: An essay regarding the almost-universal concept of a "dying and rising" deity. Details examples from a number of mythologies.
Title: The Myth of the Resurrection
Notes: An article detailing the accounts of resurrection deities in Christian, Babylonian, Egyptian, and Greek mythologies. The intent of the article is dubious, but the recounting of the myths and the mythological theory is still interesting.
Title: Wikipedia – Life, Death, & Rebirth Deity
