Mormonism                 Jehovah Witnesses                              Islam                          Roman Catholicism

What is the Gospel? - Off site article by Rolaant L. McKenzie.  First things first!  Great summarization of what the true Gospel is.

Cult: Off site. A Theological definition.

Real Audio Message on the Kingdom of The Cults - By Dr. Walter D. Martin

A Mark of False Teachers - Off site, brief article on how to discern false teaching.

Marks of a Cult - Off site

Word Of Faith Movement and Other Questionable Teachers - Kenneth Hagin, Kenneth Copeland, Frederick Price, Benny Hinn, T.D. Jakes examined. 

Jehovah Witnesses

Mormons

Roman Catholicism

Islam:  see Children of Abraham; and answering-islam.org