Eberron - Off the Rails
There are a number of religions and faiths in Eberron, most listed here.
The Silver Flame; the dominant religion of Thrane, dedicated to cleansing Eberron of all evil.
The Sovereign Host; a pantheon of deities worshiped across Khorvaire by various churches.
The Dark Six; a pantheon of six destructive, perhaps evil deities banished from the Host.
The Blood of Vol; a predominantly human religion that believes divinity lies within.
Cults of the Dragon Below; various cults dedicated to the worship of Khyber.
The Undying Court; undying elves of Aerenal sustained by the devotion of their people.
The Lord of Blades; worship a of the eponymous warforged, typically by other warforged.
The Becoming God; a religion started by warforged who wish to build their own god.
Druidic Sects; various sects and branches of Druidism worshiped throughout Khorvaire.