United States Conference of Catholic Bishops (the official site of the bishops of the U.S.)
www.usccb.org
Catholic Hierarchy (up to date listing of all popes, bishops and dioceses)
www.catholic-hierarchy.org
Preservation by Relocation
http://www.movedbygrace.com/
Catholic News Service
www.catholicnews.com
Zenit – The world seen from Rome
www.zenit.org
U. S. Catholic magazine
www.uscatholic.org
Busted Hale (evangelization outreach to 20s and 30s from the Paulist Fathers)
www.bustedhalo.com
Catholic Treasury (prayers, beliefs, spiritual teachings)
www.catholictreasury.info
Catholic Charities (network of agencies of the United States)
www.catholiccharitiesusa.org
Catholic Charities of the Diocese of Pittsburgh
www.ccpgh.org
The Pittsburgh Catholic newspaper