Adherents.com - Provides a collection of statistics and religious geography citations. Includes statistics on the world's major religions, major branches of world religions, world's largest churches, largest religious groups, and largest communities of religious peoples. Offers a FAQ section, and keyword searching capabilities.
Comparative Religion - A resource for the study of world religions. Links and essays.
Early Church Online Encyclopedia - Hypertext encyclopedia of the early Christian Church up to the Reformation.
Encyclopedia Mythica - An encyclopedia on mythology, folklore, and legend.
Encyclopedia of Hinduism - A 18 volume Encyclopedia on Hinduism.
Internet Sacred Text Archive - "This is a quiet place in cyberspace devoted to religious tolerance and scholarship."
World Mythology - An overview of myths from various cultures. Many images and examples from all over the world.
World Scripture: A Comparative Anthology of Sacred Texts - Through thousands of quotations of various world scriptures, this site tries to bring a general understanding of world religion.
Divine Digest - A quick reference guide to the major World Religions.