• Academy of Catholic Hispanic Theologians of the United States
• America
• The Catholic Encyclopedia (1st ed. 1913, see below)
• Catholic News Service
• Catholic Theological Society of America
• Catholic World News
• College Theology Society Web Resources
• Commonweal
• DioceseNet
• Documents of the Catholic Church
• Documents of Church History
• Documents of the Roman Catholic Church
• Graduate Theological Union Library
• International Network of Societies for Catholic Theology
• Journal of Histpanic / Latino Theology
• National Catholic Reporter
• National Conference of Catholic Bishops (NCCB) / United States Catholic Conference
• New Advent-Church Documents
  
• RCNet-Documents of the Roman Catholic Church (Vatican II. Encyclicals, and other Papal Documents)
• The Roman Catholic Web Ring
• Theological Studies
• Thomas Aquinas: Summa Theologica
  
• The Vatican Web Site
  
• Woodstock Theological Center

Avaliable in Fordham E-Books:

New Catholic Encyclopedia, 2nd ed.  (subsection Gale Virtual Reference Library)

Recommended Print Resources:

Fox, Thomas C. Catholicism on the Web. New York: MIS Press, 1997.

Horizons. Journal of the College Theology Society.