Mass Times
- Offers Mass times for the U.S. and other countries from information provided by diocese and individual parishes.
- http://www.masstimes.org

Ethical and Religious Directives for Catholic Health Care Services
- An electronic edition of the guidelines set forth by the United States bishops.
- http://www.usccb.org/bishops/directives.shtml

VaticanII.org: Power Search
- Allows you to search the Catechism of the Catholic Church, the Catholic Encyclopedia, or the Holy See's web site, all from one page.
- http://www.vaticanii.org/search/

Largest Catholic Communities
- Nations and U.S. states with highest numbers of Catholics; nations, U.S. states, and U.S. counties with highest proportion of Catholics; map of Catholic percentage of U.S. states' populations.
- http://www.adherents.com/largecom/com_romcath.html

Vatican Ecumenical Council I
- Decrees of Vatican I. From the Tanner edition. With concordances and word frequency lists.
- http://www.intratext.com/X/ENG0063.htm

Congregation for the Clergy
- Extensive documentation on catechesis (includes the Catechism of the Catholic Church), priests, and deacons.
- http://www.clerus.org/

College of Cardinals
- Information on the men who choose the Pope, including a complete up-to-date list of Cardinals with biographical notes and statistics.
- http://www.catholic-pages.com/hierarchy/cardinals.asp

Code of Canon Law
- Full text of the 1983 Code, with concordances and word frequency lists. Each chapter in its own file.
- http://www.intratext.com/X/ENG0017.htm

Ad Tuendam Fidem
- Issued motu proprio by Pope John Paul II on 28 May, 1998. Amends canon law. Preceded by a brief explanation of why this was necessary.
- http://www.cin.org/jp2/adtuen.html

Vatican Ecumenical Council II
- Collection of Vatican II documents. Full text, with concordances and word frequency lists. Each chapter in its own file.
- http://www.intratext.com/X/ENG0037.htm

New Advent
- Besides hosting the Summa Theologica and the 1913 Catholic Encyclopedia, this site offers a Catholic FAQ, selected writings by the Fathers of the Church, and official Church documents, mostly papal, from approximately the last 250 years.
- http://www.newadvent.org/