Religious Tolerance provides thorough profiles of 53 belief systems.

BELIEFNET : a privately funded, all-purpose gateway to religion and spirituality.

The Pluralism Project serves as a good introduction to America's leading major belief system.

Adherents.com is an encyclopedia collection of 50,000 statistics related to more than 4200 religions, churches, denominations, religiuos bodies, faith groups and movements.

Bible Browser -- Search for verse, word, or partial word in three versions: Revised Standard Version, King James Version, or Jerome's (Latin) Vulgate.

The Catholic Encyclopedia -- Alphabetical index of topics.