Best Lent Ever from The Dynamic Catholic Institute:  http://dynamiccatholic.com/bestlentever/

Catholic News from Rome:  http://www.zenit.org/en

The Official Vatican Website:  http://www.vatican.va/phome_en.htm

General Info...great for information on saints:  http://www.americancatholic.org/

Catholic Encyclopedia:  http://newadvent.org/

United States Conference of Catholic Bishops (Mass readings, complete Bible, etc.):  http://usccb.org/

National Federation for Catholic Ministry:  http://www.nfcym.org/

Excellent site for general Catholic information:  http://www.catholic.com/

Contemporary Catholic music:  http://www.catholicjukebox.com/

Catholic Links by topic:  http://www.catholicity.com/links/

Eternal Word Television Network (more conservative but good):  http://www.ewtn.com/

Mass Times for Parishes Across the Country:  catholicmasstime.org

Catechism of the Catholic Church (sponsored by the Knights of Columbus):  http://www.kofc.org/un/en/catechism/index.html