Envoy Magazine
Devoted to apologetics, equipping readers to be able to defend and explain their Catholic beliefs and practices to non-Catholics. Edited by apologist and author Patrick Madrid.
http://www.envoymagazine.com/

Returning Home to the Catholic Church
A page especially for people who have either left the Catholic faith or who are not practicing it.
http://www.catholicity.com/cathedral/returninghome/

Christifideles Pizza and Theology Society
Close orthodox Catholic finder, apologetics questions and answers, links. Requires JavaScript. Has popups. Opens new browser windows which remove all controls.
http://www.cpats.org/

Good News Ministries Catholic Lay Evangelization
Online teachings and in-parish retreats and missions, covering Church documents, scripture, prayers, lay ministry discernment, Jubilee 2000, outreach, unconditional love and service.
http://gnm.org/

Apologia
A Catholic site for Protestants and Eastern Orthodox studying the Church.
http://www.geocities.com/Athens/Atrium/8410/

Corunum Catholic Apologetic Web Page
Dedicated to the defense of Catholic doctrines within Patristic thought.
http://www.cin.org/users/jgallegos/contents.htm

Peter and Paul Ministries
Promotes and teaches the beauty and truth of the Catholic Faith.
http://www.geocities.com/~peterpaulmin/

FidoNet RCatholic Apologetics
Information on the RCatholic-L mailing list and the RCatholic conference on FidoNet. Archive of past FidoNet discussions, 1994-1997. Original apologetics essays, mini-reviews of books.
http://members.aol.com/philvaz/page/index.htm

Christlife
Catholic Evangelization Services. Information on Alpha for Catholics, Jubilee 2000, links.
http://www.christlife.org/

Ecclesia Triumphans Catholic Apologetics
Seeks to defend the Catholic faith using citations from the Bible and from the Fathers of the Church.
http://web.globalserve.net/~bumblebee/ecclesia/ecclesia.htm

C'mon Back to the Roman Catholic Church
A gentle invitation to return, for those who have become distanced from the Catholic Church.
http://cmonback.com/

Catholic Biblical Apologetics
A set of lecture notes used since 1985 to teach the basis for key doctrines and dogmas of the Roman Catholic Church.
http://www.catholicapologetics.org/

Scripture Catholic
Provides citations from the Old and New Testament that explain and defend the teachings of the Catholic Church.
http://www.scripturecatholic.com/

American Catholic Truth Society
Email lists, chat channels, online debates, and debate summaries. A great starting place for the lay-Catholic apologist.
http://www.americancatholictruthsociety.com/

Catholic Faith and Reason
Lay association in the Kansas City area dedicated to explaining the beauty of the Catholic faith. Essays on the Eucharist, the Holy Spirit, Mary, papal infallibility. Links.
http://www.catholicfaithandreason.org/

What the Roman Catholic Church Really Teaches
Answers some common objections to Catholicism, which are based on misconceptions.
http://www.geocities.com/kathers_60/Catholic_Churc/

A Doctrinal Catechism
By Stephen Keenan. 3rd American edition, 1876. Full text of book which refutes the errors of the Protestants and defends the teachings and practices of the Catholic faith. 583K.
http://www.biblelight.net/keenan.htm

Defending the Catholic Faith
Original essays, debates with non-Catholics, papal trivia, and the site owner's conversion story.
http://home.catholicweb.com/davidgrimes/

Catholics: What Do They Believe?
Informational site uses the Bible to address the misconceptions that non-Catholics have about the Catholic Church. Topics include purgatory, confession, Mary, and the pope.
http://www.anawim.pair.com/CATHOLICS/

Catholic Apologetics on the Internet
Directory. No annotations, but could be used as a quick reference.
http://www.cwo.com/~pentrack/catholic/apolo.html

Catholic Truth
An ordinary "cradle Catholic" and layman is distressed at the amount of misinformation on the Internet about the Catholic faith, and has decided to do what he can to set the record straight. Original topical essays, answers to anti-Catholic sites.
http://www.catholic-truth.org/

My Catholic
Catholic apologetics from a Filipino perspective. Includes original essays on questions about Catholicism, a history of the Bible and short history of the Church, links.
http://www.geocities.com/mycatholic/

Catholic Apologetics Primer
Using Scripture and quotes from the Early Church Fathers to clarify what Catholics really believe.
http://members.cox.net/sfobro/page4.html

The Nazareth Resource Library
A listing of questions, answers and articles explaining the Catholic faith.
http://www.cin.org/users/james/

Catholic Doctrinal Concordance
This site's purpose is to give people interested in Catholicism a quick reference for the most common items of the faith. Particularly in areas where Catholics and other religions disagree.
http://www.infpage.com/concordance/

Living Christianity
Essays, links, information on Catholicism, and some devotional material.
http://www.geocities.com/the_spacemouse/index.html

Sean's Faith Website
Apologetics information on a variety of subjects, but with an emphasis on Mormonism, Adventism, and Jehovah's Witnesses.
http://www.angelfire.com/ms/seanie/

The Catholic Legate
Lay apostolate dedicated to defending the Catholic faith. Forces frames.
http://catholic-legate.com/

Catholic Response
Features online pamphlets explaining the Catholic doctrine and morality bearing the imprimatur of Bishop Fabian Bruskewicz, Bishop of Lincoln, NE.
http://www.binary.net/polycarp/

Catholic Information League
Presents information on various topics pertaining to the Catholic Church in an easy to read graphical (tract) format.
http://www.angelfire.com/mi/CIL/

The Defender
An education newsletter published ten times per year and provided free to those that want to defend their Catholic faith.
http://www.thedefender.org

Katoliko.com
Explains the Biblical foundation of the Roman Catholic Church in the form of conversion stories and FAQs on Catholic teaching.
http://www.katoliko.com/

Augustine Club
A student organization dedicated to the study of the Christian intellectual tradition, especially with regard to the ideas and issues of our day. Offers an apologetical toolbox.
http://www.columbia.edu/cu/augustine/

Defending the Bride
Original articles defending and explaining the truths of the Catholic faith.
http://members.aol.com/johnprh/

Catholic Evidence Guild of Guam
Association of Lay Catholics in the U.S. Territory of Guam dedicated to leading men and women to Jesus Christ through clear and compelling explanations of Catholic truth.
http://www.cegguam.org

StayCatholic.com
Features essays and articles that present the biblical case for Catholicism.
http://www.staycatholic.com

Protestant or Catholic
Is the Truer form of Christianity protestant or Catholic? Which is closer to the Faith of the First Christians?
http://www.geocities.com/aprofaith/

Our Catholic Faith
Explains and corrects many of the misconceptions about the Catholic Faith.
http://www.ourcatholicfaith.org/

North Forest
Features a Protestant / Catholic debate involving a former Protestant minister who converted to Catholicism.
http://www.northforest.org/index.html

Una Fides
A Catholic apologetics site dedicated to Christian unity through education and promoting understanding. Includes various reference materials and other resources.
http://www.netacc.net/~mafg/

Lumen Verum Apologetics
Australian organisation interested in apologetics and catechetics. Offers talks and seminars in the Sydney area. Online magazine, and explanations of Catholic teaching.
http://www.lumenverum.org/

Biblical Evidence for Catholicism
This is a very large and multi-faceted site created by Catholic apologist Dave Armstrong, whose purpose is to provide information concerning the whole of Catholic theology. The apologetical material contains both original work and the work of others such as Fr. William G. Most, Scott Hahn, Fr. John A. Hardon.
http://ic.net/~erasmus/RAZHOME.HTM

In Defense of the Roman Catholic Church
Explaining Catholicism to Protestants as well as Catholics, defending the Church's teaching with appeals to Scripture and reason.
http://www.catscans.com/catholicsite/

The Rock of Peter
Addresses three topics for those interested in exploring the Catholic faith: the relationship of faith and reason, the doctrine of justification, and Mary.
http://rockofpeter.atspace.com/

Stark Visions
Features tracts and essays supporting the Biblical basis for the Papacy, the Sacraments, and other Catholic beliefs and practices.
http://starkvisions.com/again/