CATHOLIC ANSWERS
This site uses Catholic Apologists to answer your questions on the faith. It also has sections on news, forums and a host of interesting articles. http://www.catholic.com/
CATHOLICITY
Free Catholic CDs and Novels. Life-changing subjects. http://www.catholicity.com/
CATHOLICSCOMEHOME
This is a truly modern site, an audio-visual experience. It offers excellent sections for, non-catholics, catholics wishing to return to the Church and catholics wishing to deepen their faith.
http://www.catholicscomehome.org/
CATHOLIC EDUCATION
Your on-line resource centre for Catholic faith and culture.
http://www.catholiceducation.org/
http://www.thecatholicthing.org/