Roman Catholic Bibles Online

Douay of 1609: Old English version
New American Bible (NAB): free online, Roman Catholic modern English
New Jerusalem Bible (NJB): free online, uses God's name in Hebrew in Old Testment, more.
Emphatic Diaglott: Roman Catholic Greek Interlinear NT. Correctly renders John 1:1.
Protestant and Catholic: Includes Latin Vulgate and others

Other Useful RC References Online

Catholic Encyclopedia online: Many entries such as immortality, soul, easter, plato state the pagan origin of various church beliefs.