Official website of the Vatican
United States Conference of Catholic Bishops
The Official Catechism of the Church
Universalis Website for Praying the Liturgy of the Hours (Breviary) - This version of the Liturgy of the hours uses the Jerusalem version of the bible and is not appropriate for those obligated to pray the hours.
A website for Catholics
The complete Liturgical Church Calendar day by day
A catholic spiritual news site
A collection of prayers, traditions and catholic aids.
A Catholic biblical resource, apologetics, research and scriptural history
A great resource for the study of the Fathers of the Church
Catholic Learning Resources
A worldwide Catholic News service